diff --git a/src/conf.c b/src/conf.c
index 23a061f6..8dadc780 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -30,6 +30,7 @@
 #  include "config.h"
 #endif
 
+#include <limits.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>