diff --git a/kcmkwin/kwincompositing/main.cpp b/kcmkwin/kwincompositing/main.cpp
index 3d0261124f..38799cf79b 100644
--- a/kcmkwin/kwincompositing/main.cpp
+++ b/kcmkwin/kwincompositing/main.cpp
@@ -336,6 +336,8 @@ void KWinCompositingConfig::configChanged()
 
 void KWinCompositingConfig::defaults()
 {
+    ui.tabWidget->setCurrentIndex(0);
+
     ui.useCompositing->setChecked(mDefaultPrefs.enableCompositing());
     ui.effectWinManagement->setChecked(true);
     ui.effectShadows->setChecked(true);