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-rw-r--r--stdio-common/vfprintf.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c
index f5a1e23ca9..d27bbdbf57 100644
--- a/stdio-common/vfprintf.c
+++ b/stdio-common/vfprintf.c
@@ -23,6 +23,7 @@ Boston, MA 02111-1307, USA. */
#include <stdlib.h>
#include <errno.h>
#include <wchar.h>
+#include <libc-lock.h>
#include "_itoa.h"
#include "../locale/localeinfo.h"