diff --git a/src/udev-seat.h b/src/udev-seat.h
index 3543e7c3..5bf7caad 100644
--- a/src/udev-seat.h
+++ b/src/udev-seat.h
@@ -23,6 +23,8 @@
 #ifndef _UDEV_SEAT_H_
 #define _UDEV_SEAT_H_
 
+#include "config.h"
+
 #include <libudev.h>
 
 #include "compositor.h"