1 files changed, 2 insertions, 1 deletions

diff --git a/src/filelock.c b/src/filelock.c
index 48d1f0f758b..d6ee952348b 100644
--- a/src/filelock.c
+++ b/src/filelock.c
@@ -207,7 +207,8 @@ lock_file (fn)
   /* See if this file is visited and has changed on disk since it was
      visited.  */
   {
-    register Lisp_Object subject_buf = Fget_file_buffer (fn);
+    register Lisp_Object subject_buf;
+    subject_buf = Fget_file_buffer (fn);
     if (!NILP (subject_buf)
         && NILP (Fverify_visited_file_modtime (subject_buf))
         && !NILP (Ffile_exists_p (fn)))