diff --git a/repos/gems/src/server/wm/decorator_gui.h b/repos/gems/src/server/wm/decorator_gui.h
index 3aae43543b..d383ef2c8f 100644
--- a/repos/gems/src/server/wm/decorator_gui.h
+++ b/repos/gems/src/server/wm/decorator_gui.h
@@ -328,8 +328,7 @@ struct Wm::Decorator_gui_session : Genode::Rpc_object<Gui::Session>,
 
 	void upgrade(const char *args)
 	{
-		size_t const ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
-		_gui_session.upgrade_ram(ram_quota);
+		_gui_session.upgrade(Genode::session_resources_from_args(args));
 	}
 
 	Pointer::Position last_observed_pointer_pos() const
diff --git a/repos/gems/src/server/wm/gui.h b/repos/gems/src/server/wm/gui.h
index 36a8d51a1d..433139406f 100644
--- a/repos/gems/src/server/wm/gui.h
+++ b/repos/gems/src/server/wm/gui.h
@@ -813,8 +813,7 @@ class Wm::Gui::Session_component : public Rpc_object<Gui::Session>,
 
 		void upgrade(char const *args)
 		{
-			size_t const ram_quota = Arg_string::find_arg(args, "ram_quota").ulong_value(0);
-			_session.upgrade_ram(ram_quota);
+			_session.upgrade(Genode::session_resources_from_args(args));
 		}
 
 		void try_to_init_real_child_views()