diff --git a/src/server/slave.c b/src/server/slave.c
--- a/src/server/slave.c
+++ b/src/server/slave.c
@@ -18,6 +18,8 @@
 
 */
 
+#include "common/config.h"
+
 #include "slavefuncs.h"
 
 #include "common/asprintf.h"