diff --git a/contrib/libc-vis/vis.c b/contrib/libc-vis/vis.c
index a9f60c57627..fc3b50d6c7a 100644
--- a/contrib/libc-vis/vis.c
+++ b/contrib/libc-vis/vis.c
@@ -71,6 +71,7 @@ __FBSDID("$FreeBSD$");
 #include <assert.h>
 #include <vis.h>
 #include <errno.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <wchar.h>
 #include <wctype.h>