diff --git a/events.cpp b/events.cpp
index 3294248873..27b859d72a 100644
--- a/events.cpp
+++ b/events.cpp
@@ -1065,9 +1065,17 @@ int qtToX11State( Qt::ButtonState state )
     if( state & Qt::ControlButton )
         ret |= ControlMask;
     if( state & Qt::AltButton )
+#ifdef QT3_SUPPORT
+        ret |= KKeyNative::modX(KKey::ALT);
+#else
         ret |= KKeyNative::modXAlt();
+#endif
     if( state & Qt::MetaButton )
+#ifdef QT3_SUPPORT
+        ret |= KKeyNative::modX(KKey::WIN);
+#else
         ret |= KKeyNative::modXWin();
+#endif
     return ret;
     }
 
@@ -1133,8 +1141,13 @@ bool Client::buttonPressEvent( Window w, int button, int state, int x, int y, in
         updateUserTime();
         workspace()->setWasUserInteraction();
         uint keyModX = (options->keyCmdAllModKey() == Qt::Key_Meta) ?
+#ifdef QT3_SUPPORT
+            KKeyNative::modX(KKey::WIN) :
+            KKeyNative::modX(KKey::ALT);
+#else
             KKeyNative::modXWin() :
             KKeyNative::modXAlt();
+#endif
         bool bModKeyHeld = keyModX != 0 && ( state & KKeyNative::accelModMaskX()) == keyModX;
 
         if( isSplash()
diff --git a/tabbox.cpp b/tabbox.cpp
index da939f5caf..d07d99d7bf 100644
--- a/tabbox.cpp
+++ b/tabbox.cpp
@@ -724,7 +724,11 @@ void TabBox::updateKeyMapping()
     int altpos = 0;
     int winpos = 0;
     int winmodpos = -1;
+#ifdef QT3_SUPPORT
+    int winmod = KKeyNative::modX(KKey::WIN);
+#else
     int winmod = KKeyNative::modXWin();
+#endif
     while( winmod > 0 ) // get position of the set bit in winmod
         {
         winmod >>= 1;
@@ -1057,10 +1061,17 @@ void Workspace::closeTabBox()
 void Workspace::tabBoxKeyRelease( const XKeyEvent& ev )
     {
     unsigned int mk = ev.state &
+#ifdef QT3_SUPPORT
+        (KKeyNative::modX(KKey::SHIFT) |
+         KKeyNative::modX(KKey::CTRL) |
+         KKeyNative::modX(KKey::ALT) |
+         KKeyNative::modX(KKey::WIN) );
+#else
         (KKeyNative::modXShift() |
          KKeyNative::modXCtrl() |
          KKeyNative::modXAlt() |
          KKeyNative::modXWin() );
+#endif
     // ev.state is state before the key release, so just checking mk being 0 isn't enough
     // using XQueryPointer() also doesn't seem to work well, so the check that all
     // modifiers are released: only one modifier is active and the currently released