diff --git a/programs/clock/winclock.c b/programs/clock/winclock.c
index 59d7a5015d1..b75e03d51d0 100644
--- a/programs/clock/winclock.c
+++ b/programs/clock/winclock.c
@@ -24,6 +24,9 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include "config.h"
+#include "wine/port.h"
+
 #include <math.h>
 #include <stdlib.h>
 #include <string.h>