1 files changed, 2 insertions, 2 deletions

diff --git a/src/undo.c b/src/undo.c
index 53dc6ae2c54..eed355e5b10 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -294,9 +294,9 @@ Return what remains of the list.")
                      then don't mark unmodified.  */
                   if (mod_time != current_buffer->modtime)
                     break;
-    #ifdef CLASH_DETECTION
+#ifdef CLASH_DETECTION
                   Funlock_buffer ();
-    #endif /* CLASH_DETECTION */
+#endif /* CLASH_DETECTION */
                   Fset_buffer_modified_p (Qnil);
                 }
               else if (XTYPE (car) == Lisp_Int && XTYPE (cdr) == Lisp_Int)