diff --git a/libkwineffects/kwineffects.h b/libkwineffects/kwineffects.h
index bd57e0fc58..c8ea0b586b 100644
--- a/libkwineffects/kwineffects.h
+++ b/libkwineffects/kwineffects.h
@@ -2574,7 +2574,7 @@ private:
 };
 
 class KWINEFFECTS_EXPORT WindowQuadList
-    : public QList< WindowQuad >
+    : public QVector<WindowQuad>
 {
 public:
     WindowQuadList splitAtX(double x) const;