diff --git a/kcmkwin/kwincompositing/main.cpp b/kcmkwin/kwincompositing/main.cpp
index f2e8719c5c..7b7cd37125 100644
--- a/kcmkwin/kwincompositing/main.cpp
+++ b/kcmkwin/kwincompositing/main.cpp
@@ -151,7 +151,8 @@ void KWinCompositingConfig::showConfirmDialog()
             config.writeEntry(i.key(), i.value());
             ++i;
         }
-        config.sync();
+        // Sync with KWin and reload
+        configChanged();
         load();
     }
 }