diff --git a/usr.bin/csup/diff.c b/usr.bin/csup/diff.c
index 80596768998..bafb458e05b 100644
--- a/usr.bin/csup/diff.c
+++ b/usr.bin/csup/diff.c
@@ -26,11 +26,10 @@
  * $FreeBSD$
  */
 
-#include <sys/limits.h>
-
 #include <assert.h>
 #include <err.h>
 #include <errno.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>