diff --git a/kwin/mobiletaskswitcher/mobiletaskswitchereffect.h b/kwin/mobiletaskswitcher/mobiletaskswitchereffect.h
index f7dbc95d..d0ba5b76 100644
--- a/kwin/mobiletaskswitcher/mobiletaskswitchereffect.h
+++ b/kwin/mobiletaskswitcher/mobiletaskswitchereffect.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <libkwineffects/kwineffects.h>
 #include <libkwineffects/kwinquickeffect.h>
 
 #include <span>