diff --git a/uppsrc/CtrlCore/CtrlCore.h b/uppsrc/CtrlCore/CtrlCore.h
index 7cb2ee88d..336ac85f4 100644
--- a/uppsrc/CtrlCore/CtrlCore.h
+++ b/uppsrc/CtrlCore/CtrlCore.h
@@ -636,6 +636,8 @@ private:
 
 	static void GuiSleep0(int ms);
 
+	void SysEndLoop();
+
 	static void InitTimer();
 
 	static String appname;
diff --git a/uppsrc/CtrlCore/CtrlTimer.cpp b/uppsrc/CtrlCore/CtrlTimer.cpp
index bb485c12a..68e8c3c4e 100644
--- a/uppsrc/CtrlCore/CtrlTimer.cpp
+++ b/uppsrc/CtrlCore/CtrlTimer.cpp
@@ -185,6 +185,7 @@ void   Ctrl::EndLoop()
 {
 	GuiLock __;
 	inloop = false;
+	SysEndLoop();
 }
 
 void   Ctrl::EndLoop(int code)
diff --git a/uppsrc/CtrlCore/Win32Wnd.cpp b/uppsrc/CtrlCore/Win32Wnd.cpp
index fdb1f0094..352bcf9c0 100644
--- a/uppsrc/CtrlCore/Win32Wnd.cpp
+++ b/uppsrc/CtrlCore/Win32Wnd.cpp
@@ -863,6 +863,10 @@ bool Ctrl::ProcessEvent(bool *quit)
 	return false;
 }
 
+void Ctrl::SysEndLoop()
+{
+}
+
 bool Ctrl::ProcessEvents(bool *quit)
 {
 	if(ProcessEvent(quit)) {
diff --git a/uppsrc/CtrlCore/X11Wnd.cpp b/uppsrc/CtrlCore/X11Wnd.cpp
index 66258d610..74ed984b5 100644
--- a/uppsrc/CtrlCore/X11Wnd.cpp
+++ b/uppsrc/CtrlCore/X11Wnd.cpp
@@ -413,6 +413,10 @@ void Ctrl::SetTimerGranularity(int ms)
 	granularity = ms;
 }
 
+void Ctrl::SysEndLoop()
+{
+}
+
 void Ctrl::EventLoop0(Ctrl *ctrl)
 {
 	GuiLock __;