diff --git a/src/cmdexpand.c b/src/cmdexpand.c
index 57bf47a..e0ad1a7 100644
--- a/src/cmdexpand.c
+++ b/src/cmdexpand.c
@@ -2394,6 +2394,7 @@
 
 /*
  * Expand file or directory names.
+ * Returns OK or FAIL.
  */
     static int
 expand_files_and_dirs(