diff --git a/src/misc1.c b/src/misc1.c
index 0e0705d..6c5cb6a 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -4014,7 +4014,8 @@
 }
 
 /*
- * get the tail of a path: the file name.
+ * Get the tail of a path: the file name.
+ * Fail safe: never returns NULL.
  */
     char_u *
 gettail(fname)