diff --git a/uppsrc/CtrlLib/ChGtk3.cpp b/uppsrc/CtrlLib/ChGtk3.cpp
index d8f7f8722..d497fdb1f 100644
--- a/uppsrc/CtrlLib/ChGtk3.cpp
+++ b/uppsrc/CtrlLib/ChGtk3.cpp
@@ -428,6 +428,8 @@ void ChHostSkin()
 		s.topitemtext[2] = GetInkColor();
 	}
 
+	SwapOKCancel_Write(Environment().Get("KDE_FULL_SESSION", String()) != "true");
+
 	Gtk_Free();
 }