diff --git a/src/checker.c b/src/checker.c
index a2c29dd7c..27648e7af 100644
--- a/src/checker.c
+++ b/src/checker.c
@@ -9,6 +9,7 @@
 #include "util/pofile.h"
 
 #include <errno.h>
+#include <limits.h>
 #include <stdio.h>
 #include <string.h>