diff --git a/AuthDialog.cpp b/AuthDialog.cpp
--- a/AuthDialog.cpp
+++ b/AuthDialog.cpp
@@ -58,7 +58,7 @@
         KWindowSystem::setMainWindow(this, parent);
 
         // Set modal
-        KWindowSystem::setState(winId(), NET::Modal);
+        setWindowModality(Qt::ApplicationModal);
 
         // raise on top
         activateWindow();