diff --git a/composite.cpp b/composite.cpp
index 1b2e7a40b1..56bee8c65a 100644
--- a/composite.cpp
+++ b/composite.cpp
@@ -20,8 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "composite.h"
 #include "compositingadaptor.h"
 
-#include <config-X11.h>
-
 #include "utils.h"
 #include <QTextStream>
 #include "workspace.h"
diff --git a/utils.h b/utils.h
index 7097daa78e..fe1b0b9471 100644
--- a/utils.h
+++ b/utils.h
@@ -23,7 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define KWIN_UTILS_H
 
 // cmake stuff
-#include <config-X11.h>
 #include <config-kwin.h>
 #include <kwinconfig.h>
 // kwin