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-rw-r--r--stdlib/isomac.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/stdlib/isomac.c b/stdlib/isomac.c
index 816298b210..ae99aef1c9 100644
--- a/stdlib/isomac.c
+++ b/stdlib/isomac.c
@@ -1,5 +1,5 @@
/* Check system header files for ISO 9899:1990 (ISO C) compliance.
- Copyright (C) 1996-2015 Free Software Foundation, Inc.
+ Copyright (C) 1996-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jens Schweikhardt <schweikh@noc.dfn.de>, 1996.
@@ -70,6 +70,7 @@
# define _GNU_SOURCE 1
#endif
+#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>