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-rw-r--r--libio/rewind.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libio/rewind.c b/libio/rewind.c
index dfb02cc3f2..2f57e0de83 100644
--- a/libio/rewind.c
+++ b/libio/rewind.c
@@ -29,5 +29,7 @@ rewind (fp)
      _IO_FILE* fp;
 {
   CHECK_FILE (fp, );
+  _IO_flockfile (fp);
   _IO_rewind (fp);
+  _IO_funlockfile (fp);
 }