diff --git a/openbox/screen.c b/openbox/screen.c
index 0a7b34f1..a1ad36e0 100644
--- a/openbox/screen.c
+++ b/openbox/screen.c
@@ -1,5 +1,6 @@
 #include "openbox.h"
 #include "dock.h"
+#include "xerror.h"
 #include "prop.h"
 #include "startup.h"
 #include "timer.h"