diff --git a/libkdecorations/kdecoration.h b/libkdecorations/kdecoration.h
index 16d267cbb1..77de623aa0 100644
--- a/libkdecorations/kdecoration.h
+++ b/libkdecorations/kdecoration.h
@@ -33,6 +33,7 @@ DEALINGS IN THE SOFTWARE.
 #include <QtGui/QIcon>
 #include <netwm_def.h>
 #include <QtGui/QMouseEvent>
+#include <KPluginFactory>
 
 #define KWIN_DECORATION_API_VERSION 1