diff --git a/kcmkwin/kwincompositing/main.cpp b/kcmkwin/kwincompositing/main.cpp
index e533141f2d..c4900d4877 100644
--- a/kcmkwin/kwincompositing/main.cpp
+++ b/kcmkwin/kwincompositing/main.cpp
@@ -69,6 +69,7 @@ KWinCompositingConfig::KWinCompositingConfig(QWidget *parent, const QVariantList
 {
     KGlobal::locale()->insertCatalog( "kwin_effects" );
     ui.setupUi(this);
+    layout()->setMargin(0);
     ui.tabWidget->setCurrentIndex(0);
     ui.statusLabel->hide();