diff --git a/kwin/lib/kdecoration.cpp b/kwin/lib/kdecoration.cpp
index 7b1ef93e1..ee8eb866d 100644
--- a/kwin/lib/kdecoration.cpp
+++ b/kwin/lib/kdecoration.cpp
@@ -57,7 +57,7 @@ const KDecorationOptions* KDecoration::options()
     return options_;
     }
 
-void KDecoration::createMainWidget( WFlags flags )
+void KDecoration::createMainWidget( TQt::WFlags flags )
     {
     // FRAME check flags?
     setMainWidget( new TQWidget( initialParentWidget(), "decoration widget", initialWFlags() | flags ));
@@ -76,7 +76,7 @@ TQWidget* KDecoration::initialParentWidget() const
     return bridge_->initialParentWidget();
     }
 
-WFlags KDecoration::initialWFlags() const
+TQt::WFlags KDecoration::initialWFlags() const
     {
     return bridge_->initialWFlags();
     }
diff --git a/kwin/lib/kdecoration.h b/kwin/lib/kdecoration.h
index 7ce588142..61c3d924f 100644
--- a/kwin/lib/kdecoration.h
+++ b/kwin/lib/kdecoration.h
@@ -695,7 +695,7 @@ class KWIN_EXPORT KDecoration
 	 *              flags that affect widget drawing are allowed. Window type flags
 	 *              like WX11BypassWM or WStyle_NoBorder are forbidden.
 	 */
-        void createMainWidget( WFlags flags = 0 );
+        void createMainWidget( TQt::WFlags flags = 0 );
 	/**
 	 * The parent widget that should be used for the main widget.
 	 */
@@ -706,7 +706,7 @@ class KWIN_EXPORT KDecoration
 	 * that affect widget drawing are allowed. Window type flags like WX11BypassWM
 	 * or WStyle_NoBorder are forbidden.
 	 */
-        WFlags initialWFlags() const;
+        TQt::WFlags initialWFlags() const;
 	/**
 	 * This function is only allowed to be called once from animateMinimize().
 	 * It can be used if the window should be shown or hidden at a specific