diff --git a/repos/os/src/server/nic_router/link.cc b/repos/os/src/server/nic_router/link.cc
index 0763c5d8d..f4cb023d4 100644
--- a/repos/os/src/server/nic_router/link.cc
+++ b/repos/os/src/server/nic_router/link.cc
@@ -37,13 +37,13 @@ constexpr size_t Link_side_id::data_size()
 
 bool Link_side_id::operator == (Link_side_id const &id) const
 {
-	return memcmp(id.data, data, data_size()) == 0;
+	return memcmp(id.data_base(), data_base(), data_size()) == 0;
 }
 
 
 bool Link_side_id::operator > (Link_side_id const &id) const
 {
-	return memcmp(id.data, data, data_size()) > 0;
+	return memcmp(id.data_base(), data_base(), data_size()) > 0;
 }
 
 
diff --git a/repos/os/src/server/nic_router/link.h b/repos/os/src/server/nic_router/link.h
index bb1570d09..44492722f 100644
--- a/repos/os/src/server/nic_router/link.h
+++ b/repos/os/src/server/nic_router/link.h
@@ -42,7 +42,6 @@ namespace Net {
 
 struct Net::Link_side_id
 {
-	int          const data[];
 	Ipv4_address const src_ip;
 	Port         const src_port;
 	Ipv4_address const dst_ip;
@@ -50,6 +49,8 @@ struct Net::Link_side_id
 
 	static constexpr Genode::size_t data_size();
 
+	void *data_base() const { return (void *)&src_ip; }
+
 
 	/************************
 	 ** Standard operators **