diff --git a/clients/b2/b2client.cpp b/clients/b2/b2client.cpp
index e74659b92d..c317dfc63f 100644
--- a/clients/b2/b2client.cpp
+++ b/clients/b2/b2client.cpp
@@ -1383,7 +1383,7 @@ void B2Titlebar::paintEvent(QPaintEvent *)
 
 void B2Titlebar::mouseDoubleClickEvent(QMouseEvent *e)
 {
-    if (e->y() < height()) {
+    if (e->button() == LeftButton && e->y() < height()) {
 	client->titlebarDblClickOperation();
     }
 }
diff --git a/clients/keramik/keramik.cpp b/clients/keramik/keramik.cpp
index 109d221ff3..49c3476e3c 100644
--- a/clients/keramik/keramik.cpp
+++ b/clients/keramik/keramik.cpp
@@ -1653,7 +1653,8 @@ void KeramikClient::resizeEvent( QResizeEvent *e )
 
 void KeramikClient::mouseDoubleClickEvent( QMouseEvent *e )
 {
-	if ( QRect( 0, 0, width(), clientHandler->titleBarHeight( largeTitlebar ) ).contains( e->pos() ) )
+	if ( e->button() == LeftButton
+            && QRect( 0, 0, width(), clientHandler->titleBarHeight( largeTitlebar ) ).contains( e->pos() ) )
 		titlebarDblClickOperation();
 }
 
diff --git a/clients/kwmtheme/kwmthemeclient.cpp b/clients/kwmtheme/kwmthemeclient.cpp
index eac4311310..a422f31fb5 100644
--- a/clients/kwmtheme/kwmthemeclient.cpp
+++ b/clients/kwmtheme/kwmthemeclient.cpp
@@ -752,7 +752,7 @@ void KWMThemeClient::showEvent(QShowEvent *)
 
 void KWMThemeClient::mouseDoubleClickEvent( QMouseEvent * e )
 {
-    if (titlebar->geometry().contains( e->pos() ) )
+    if (e->button() == LeftButton && titlebar->geometry().contains( e->pos() ) )
         titlebarDblClickOperation();
 }
 
diff --git a/lib/kcommondecoration.cpp b/lib/kcommondecoration.cpp
index 5da52cee4c..ba5a8a3f41 100644
--- a/lib/kcommondecoration.cpp
+++ b/lib/kcommondecoration.cpp
@@ -684,8 +684,10 @@ void KCommonDecoration::resizeWidget(int w, int h, QWidget *widget) const
 
 void KCommonDecoration::mouseDoubleClickEvent(QMouseEvent *e)
 {
-    int tb = layoutMetric(LM_TitleEdgeTop)+layoutMetric(LM_TitleHeight)+layoutMetric(LM_TitleEdgeBottom);
+    if( e->button() != LeftButton )
+        return;
 
+    int tb = layoutMetric(LM_TitleEdgeTop)+layoutMetric(LM_TitleHeight)+layoutMetric(LM_TitleEdgeBottom);
     // when shaded, react on double clicks everywhere to make it easier to unshade. otherwise
     // react only on double clicks in the title bar region...
     if (isSetShade() || e->pos().y() <= tb )