diff --git a/clients/gears.c b/clients/gears.c
index 160b0793..a0807418 100644
--- a/clients/gears.c
+++ b/clients/gears.c
@@ -20,6 +20,8 @@
  * OF THIS SOFTWARE.
  */
 
+#include "config.h"
+
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>