diff --git a/usr.bin/look/look.c b/usr.bin/look/look.c
index 0088864c81ca..a655b39d2152 100644
--- a/usr.bin/look/look.c
+++ b/usr.bin/look/look.c
@@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
 #include <limits.h>
 #include <locale.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>