diff --git a/lib/kwineffects.cpp b/lib/kwineffects.cpp
index 7d1d6b0632..81b6ca34e3 100644
--- a/lib/kwineffects.cpp
+++ b/lib/kwineffects.cpp
@@ -39,6 +39,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <X11/extensions/Xrender.h>
 #endif
 
+#include <X11/extensions/Xfixes.h>
 
 namespace KWin
 {