diff --git a/src/gui.c b/src/gui.c
index adca7fb..a7ae722 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -2714,7 +2714,7 @@
 }
 
 /*
- * Fill buffer with mouse coordinates encoded for check_termcode().
+ * Fill p[4] with mouse coordinates encoded for check_termcode().
  */
     static void
 fill_mouse_coord(p, col, row)