diff --git a/kcms/icons/changeicons.cpp b/kcms/icons/changeicons.cpp
--- a/kcms/icons/changeicons.cpp
+++ b/kcms/icons/changeicons.cpp
@@ -55,5 +55,5 @@
     }
 
     KBuildSycocaProgressDialog::rebuildKSycoca(nullptr);
-    app.exec();
+    return 0;
 }