diff --git a/src/agent.c b/src/agent.c
index fb3e975f..be6ab1c0 100644
--- a/src/agent.c
+++ b/src/agent.c
@@ -36,6 +36,8 @@
 
 #ifndef _WIN32
 
+#include "config.h"
+
 #include <stdlib.h>
 #include <errno.h>
 #include <string.h>