diff --git a/effects/demo_taskbarthumbnail.desktop b/effects/demo_taskbarthumbnail.desktop
index ecb19144d2..8b91838c05 100644
--- a/effects/demo_taskbarthumbnail.desktop
+++ b/effects/demo_taskbarthumbnail.desktop
@@ -63,4 +63,4 @@ X-KDE-PluginInfo-Category=Window Management
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-EnabledByDefault=false
-X-KDE-Library=kwin4_effect_tests
+X-KDE-Library=kwin4_effect_builtins