diff --git a/src/config.c b/src/config.c
index dd5e8241..19f0c92d 100644
--- a/src/config.c
+++ b/src/config.c
@@ -38,6 +38,7 @@
 
 #include <stdio.h>
 #include <unistd.h>
+#include <limits.h>
 #include <stdlib.h>
 #include <assert.h>
 #include <string.h>