diff --git a/base/src/core/include/ram_session_component.h b/base/src/core/include/ram_session_component.h
index b9c87274e..5d56bfd66 100644
--- a/base/src/core/include/ram_session_component.h
+++ b/base/src/core/include/ram_session_component.h
@@ -73,8 +73,7 @@ namespace Genode {
 			/**
 			 * Return portion of RAM quota that is currently in use
 			 */
-			size_t used_quota() {
-				return _ds_slab.consumed() + _payload + sizeof(*this); }
+			size_t used_quota() { return _payload; }
 
 			/**
 			 * Free dataspace