1 files changed, 1 insertions, 1 deletions

diff --git a/src/buffer.h b/src/buffer.h
index 4a13cb0d18e..2c7318305ea 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -61,7 +61,7 @@ Boston, MA 02111-1307, USA.  */
 #define MODIFF (current_buffer->text->modiff)
 
 /* Overlay modification count.  */
-#define OVERLAY_MODIFF(buf) (current_buffer->text->overlay_modiff)
+#define OVERLAY_MODIFF (current_buffer->text->overlay_modiff)
 
 /* Modification count as of last visit or save.  */
 #define SAVE_MODIFF (current_buffer->text->save_modiff)