diff --git a/repos/base-hw/src/core/include/signal_root.h b/repos/base-hw/src/core/include/signal_root.h
index 871f1f5d5..e9f948224 100644
--- a/repos/base-hw/src/core/include/signal_root.h
+++ b/repos/base-hw/src/core/include/signal_root.h
@@ -77,7 +77,7 @@ namespace Genode
 			Signal_session_component * _create_session(const char * args)
 			{
 				size_t ram_quota =
-					Arg_string::find_arg(args, "ram_quota").long_value(0);
+					Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				return new (md_alloc())
 					Signal_session_component(md_alloc(), ram_quota);
 			}
@@ -86,7 +86,7 @@ namespace Genode
 			                      const char * args)
 			{
 				size_t ram_quota =
-					Arg_string::find_arg(args, "ram_quota").long_value(0);
+					Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				s->upgrade_ram_quota(ram_quota);
 			}
 	};
diff --git a/repos/base-hw/src/core/include/vm_root.h b/repos/base-hw/src/core/include/vm_root.h
index f49145d4e..09f0551a4 100644
--- a/repos/base-hw/src/core/include/vm_root.h
+++ b/repos/base-hw/src/core/include/vm_root.h
@@ -28,7 +28,7 @@ namespace Genode {
 
 			Vm_session_component *_create_session(const char *args)
 			{
-				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				return new (md_alloc()) Vm_session_component(ep(), ram_quota);
 			}
 
diff --git a/repos/base/include/root/component.h b/repos/base/include/root/component.h
index 9f66b6ecc..2162f1d20 100644
--- a/repos/base/include/root/component.h
+++ b/repos/base/include/root/component.h
@@ -210,7 +210,7 @@ class Genode::Root_component : public Rpc_object<Typed_root<SESSION_TYPE> >,
 			 * We need to decrease 'ram_quota' by
 			 * the size of the session object.
 			 */
-			size_t ram_quota = Arg_string::find_arg(args.string(), "ram_quota").long_value(0);
+			size_t ram_quota = Arg_string::find_arg(args.string(), "ram_quota").ulong_value(0);
 			size_t needed = sizeof(SESSION_TYPE) + md_alloc()->overhead(sizeof(SESSION_TYPE));
 
 			if (needed > ram_quota) {
diff --git a/repos/base/src/base/child/child.cc b/repos/base/src/base/child/child.cc
index 19d29031e..7478a767e 100644
--- a/repos/base/src/base/child/child.cc
+++ b/repos/base/src/base/child/child.cc
@@ -281,7 +281,7 @@ Session_capability Child::session(Parent::Service_name const &name,
 	Affinity const filtered_affinity = _policy->filter_session_affinity(affinity);
 
 	/* transfer the quota donation from the child's account to ourself */
-	size_t ram_quota = Arg_string::find_arg(_args, "ram_quota").long_value(0);
+	size_t ram_quota = Arg_string::find_arg(_args, "ram_quota").ulong_value(0);
 
 	Transfer donation_from_child(ram_quota, _ram, env()->ram_session_cap());
 
diff --git a/repos/base/src/core/cpu_session_component.cc b/repos/base/src/core/cpu_session_component.cc
index afc355065..c9cfd39a4 100644
--- a/repos/base/src/core/cpu_session_component.cc
+++ b/repos/base/src/core/cpu_session_component.cc
@@ -285,7 +285,7 @@ static size_t remaining_session_ram_quota(char const *args)
 	 * We don't need to consider an underflow here because
 	 * 'Cpu_root::_create_session' already checks for the condition.
 	 */
-	return Arg_string::find_arg(args, "ram_quota").long_value(0)
+	return Arg_string::find_arg(args, "ram_quota").ulong_value(0)
 	     - Trace::Control_area::SIZE;
 }
 
diff --git a/repos/base/src/core/include/cpu_root.h b/repos/base/src/core/include/cpu_root.h
index ca28eca65..46a2c7839 100644
--- a/repos/base/src/core/include/cpu_root.h
+++ b/repos/base/src/core/include/cpu_root.h
@@ -37,7 +37,7 @@ namespace Genode {
 			                                       Affinity const &affinity) {
 
 				size_t ram_quota =
-					Arg_string::find_arg(args, "ram_quota").long_value(0);
+					Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 
 				if (ram_quota < Trace::Control_area::SIZE)
 					throw Root::Quota_exceeded();
@@ -51,7 +51,7 @@ namespace Genode {
 
 			void _upgrade_session(Cpu_session_component *cpu, const char *args)
 			{
-				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				cpu->upgrade_ram_quota(ram_quota);
 			}
 
diff --git a/repos/base/src/core/include/ram_root.h b/repos/base/src/core/include/ram_root.h
index 3824358e9..fa50fa6ee 100644
--- a/repos/base/src/core/include/ram_root.h
+++ b/repos/base/src/core/include/ram_root.h
@@ -38,7 +38,7 @@ namespace Genode {
 
 			void _upgrade_session(Ram_session_component *ram, const char *args)
 			{
-				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				ram->upgrade_ram_quota(ram_quota);
 			}
 
diff --git a/repos/base/src/core/include/rm_root.h b/repos/base/src/core/include/rm_root.h
index edb7afc00..242ae725b 100644
--- a/repos/base/src/core/include/rm_root.h
+++ b/repos/base/src/core/include/rm_root.h
@@ -44,7 +44,7 @@ namespace Genode {
 			{
 				addr_t start     = Arg_string::find_arg(args, "start").ulong_value(~0UL);
 				size_t size      = Arg_string::find_arg(args, "size").ulong_value(0);
-				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 
 				return new (md_alloc())
 				       Rm_session_component(_ds_ep,
@@ -78,7 +78,7 @@ namespace Genode {
 
 			void _upgrade_session(Rm_session_component *rm, const char *args)
 			{
-				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				rm->upgrade_ram_quota(ram_quota);
 			}
 
diff --git a/repos/base/src/core/include/signal_root.h b/repos/base/src/core/include/signal_root.h
index 064e4dac5..3ee58ca47 100644
--- a/repos/base/src/core/include/signal_root.h
+++ b/repos/base/src/core/include/signal_root.h
@@ -46,7 +46,7 @@ namespace Genode {
 
 			Signal_session_component *_create_session(const char *args)
 			{
-				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				return new (md_alloc())
 					Signal_session_component(entrypoint(), entrypoint(),
 					                         md_alloc(), ram_quota);
@@ -54,7 +54,7 @@ namespace Genode {
 
 			void _upgrade_session(Signal_session_component *s, const char *args)
 			{
-				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+				size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 				s->upgrade_ram_quota(ram_quota);
 			}
 
diff --git a/repos/base/src/core/include/trace/root.h b/repos/base/src/core/include/trace/root.h
index 0b7c78742..a2e0f179d 100644
--- a/repos/base/src/core/include/trace/root.h
+++ b/repos/base/src/core/include/trace/root.h
@@ -34,7 +34,7 @@ class Genode::Trace::Root : public Genode::Root_component<Session_component>
 
 		Session_component *_create_session(const char *args)
 		{
-			size_t ram_quota       = Arg_string::find_arg(args, "ram_quota").long_value(0);
+			size_t ram_quota       = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 			size_t arg_buffer_size = Arg_string::find_arg(args, "arg_buffer_size").ulong_value(0);
 			unsigned parent_levels = Arg_string::find_arg(args, "parent_levels").ulong_value(0);
 
@@ -51,7 +51,7 @@ class Genode::Trace::Root : public Genode::Root_component<Session_component>
 
 		void _upgrade_session(Session_component *s, const char *args)
 		{
-			size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+			size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 			s->upgrade_ram_quota(ram_quota);
 		}
 
diff --git a/repos/base/src/core/ram_session_component.cc b/repos/base/src/core/ram_session_component.cc
index 13b89e126..a4272cfc5 100644
--- a/repos/base/src/core/ram_session_component.cc
+++ b/repos/base/src/core/ram_session_component.cc
@@ -265,13 +265,13 @@ Ram_session_component::Ram_session_component(Rpc_entrypoint  *ds_ep,
 :
 	_ds_ep(ds_ep), _ram_session_ep(ram_session_ep), _ram_alloc(ram_alloc),
 	_quota_limit(quota_limit), _payload(0),
-	_md_alloc(md_alloc, Arg_string::find_arg(args, "ram_quota").long_value(0)),
+	_md_alloc(md_alloc, Arg_string::find_arg(args, "ram_quota").ulong_value(0)),
 	_ds_slab(&_md_alloc), _ref_account(0),
-	_phys_start(Arg_string::find_arg(args, "phys_start").long_value(0))
+	_phys_start(Arg_string::find_arg(args, "phys_start").ulong_value(0))
 {
 	Arg_string::find_arg(args, "label").string(_label, sizeof(_label), "");
 
-	size_t phys_size = Arg_string::find_arg(args, "phys_size").long_value(0);
+	size_t phys_size = Arg_string::find_arg(args, "phys_size").ulong_value(0);
 	/* sanitize overflow and interpret phys_size==0 as maximum phys address */
 	if (_phys_start + phys_size <= _phys_start)
 		_phys_end = ~0UL;
diff --git a/repos/libports/src/lib/qt5/qpluginwidget/qpluginwidget.cpp b/repos/libports/src/lib/qt5/qpluginwidget/qpluginwidget.cpp
index 5eb6dc6f0..649264e20 100644
--- a/repos/libports/src/lib/qt5/qpluginwidget/qpluginwidget.cpp
+++ b/repos/libports/src/lib/qt5/qpluginwidget/qpluginwidget.cpp
@@ -111,7 +111,7 @@ void PluginStarter::_start_plugin(QString &file_name, QByteArray const &file_buf
 
 		PDBG("file_size_uncompressed = %u", file_size);
 
-		size_t ram_quota = Arg_string::find_arg(_args.constData(), "ram_quota").long_value(0) + file_size;
+		size_t ram_quota = Arg_string::find_arg(_args.constData(), "ram_quota").ulong_value(0) + file_size;
 
 		if ((long)env()->ram_session()->avail() - (long)ram_quota < QPluginWidget::RAM_QUOTA) {
 			PERR("quota exceeded");
@@ -161,7 +161,7 @@ void PluginStarter::_start_plugin(QString &file_name, QByteArray const &file_buf
 			_pc->commit_rom_module(file_name.toUtf8().constData());
 		}
 	} else {
-		size_t ram_quota = Arg_string::find_arg(_args.constData(), "ram_quota").long_value(0);
+		size_t ram_quota = Arg_string::find_arg(_args.constData(), "ram_quota").ulong_value(0);
 
 		if ((long)env()->ram_session()->avail() - (long)ram_quota < QPluginWidget::RAM_QUOTA) {
 			_plugin_loading_state = QUOTA_EXCEEDED_ERROR;
diff --git a/repos/os/include/init/child_policy.h b/repos/os/include/init/child_policy.h
index 42f057c2b..b3608317e 100644
--- a/repos/os/include/init/child_policy.h
+++ b/repos/os/include/init/child_policy.h
@@ -151,7 +151,7 @@ class Init::Child_policy_handle_cpu_priorities
 			if (Genode::strcmp(service, "CPU") || _prio_levels_log2 == 0)
 				return;
 
-			unsigned long priority = Arg_string::find_arg(args, "priority").long_value(0);
+			unsigned long priority = Arg_string::find_arg(args, "priority").ulong_value(0);
 
 			/* clamp priority value to valid range */
 			priority = min((unsigned)Cpu_session::PRIORITY_LIMIT - 1, priority);
diff --git a/repos/os/src/server/loader/main.cc b/repos/os/src/server/loader/main.cc
index e1950106e..d08e03360 100644
--- a/repos/os/src/server/loader/main.cc
+++ b/repos/os/src/server/loader/main.cc
@@ -408,7 +408,7 @@ class Loader::Root : public Root_component<Session_component>
 		Session_component *_create_session(const char *args)
 		{
 			size_t quota =
-				Arg_string::find_arg(args, "ram_quota").long_value(0);
+				Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 
 			return new (md_alloc()) Session_component(quota, _ram, _cap);
 		}
diff --git a/repos/os/src/server/log_report/main.cc b/repos/os/src/server/log_report/main.cc
index 83379d8bb..4200859e7 100644
--- a/repos/os/src/server/log_report/main.cc
+++ b/repos/os/src/server/log_report/main.cc
@@ -85,7 +85,7 @@ class Report::Root : public Genode::Root_component<Session_component>
 
 			/* read report buffer size from session arguments */
 			size_t const buffer_size =
-				Arg_string::find_arg(args, "buffer_size").long_value(0);
+				Arg_string::find_arg(args, "buffer_size").ulong_value(0);
 
 			return new (md_alloc())
 				Session_component(Session_component::Label(label), buffer_size);
diff --git a/repos/os/src/server/nitpicker/main.cc b/repos/os/src/server/nitpicker/main.cc
index bf1794ade..3e612125f 100644
--- a/repos/os/src/server/nitpicker/main.cc
+++ b/repos/os/src/server/nitpicker/main.cc
@@ -1045,7 +1045,7 @@ class Nitpicker::Root : public Genode::Root_component<Session_component>
 
 		void _upgrade_session(Session_component *s, const char *args)
 		{
-			size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
+			size_t ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
 			s->upgrade_ram_quota(ram_quota);
 		}
 
diff --git a/repos/os/src/server/report_rom/report_service.h b/repos/os/src/server/report_rom/report_service.h
index 063a544a6..a290dd1fe 100644
--- a/repos/os/src/server/report_rom/report_service.h
+++ b/repos/os/src/server/report_rom/report_service.h
@@ -92,7 +92,7 @@ struct Report::Root : Genode::Root_component<Session_component>
 
 			/* read report buffer size from session arguments */
 			size_t const buffer_size =
-				Arg_string::find_arg(args, "buffer_size").long_value(0);
+				Arg_string::find_arg(args, "buffer_size").ulong_value(0);
 
 			return new (md_alloc())
 				Session_component(Rom::Module::Name(label), buffer_size,
diff --git a/repos/ports/src/app/gdb_monitor/app_child.h b/repos/ports/src/app/gdb_monitor/app_child.h
index 578be8780..614475e5a 100644
--- a/repos/ports/src/app/gdb_monitor/app_child.h
+++ b/repos/ports/src/app/gdb_monitor/app_child.h
@@ -180,7 +180,7 @@ namespace Gdb_monitor {
 
 						Genode::size_t ram_quota =
 							Arg_string::find_arg(args.string(),
-							                     "ram_quota").long_value(0);
+							                     "ram_quota").ulong_value(0);
 
 						/* forward session quota to child */
 						env()->ram_session()->transfer_quota(_child_ram, ram_quota);
@@ -209,7 +209,7 @@ namespace Gdb_monitor {
 
 						Genode::size_t ram_quota =
 							Arg_string::find_arg(args.string(),
-							                     "ram_quota").long_value(0);
+							                     "ram_quota").ulong_value(0);
 
 						/* forward session quota to child */
 						env()->ram_session()->transfer_quota(_child_ram, ram_quota);