diff --git a/README.md b/README.md
index 5569b9b..d292e0c 100644
--- a/README.md
+++ b/README.md
@@ -1100,7 +1100,7 @@ Alternative to the `basename` command.
 
 ```sh
 basename() {
-    # Usage: basename "path"
+    # Usage: basename "path" ["suffix"]
     dir=${1%${1##*[!/]}}
     dir=${dir##*/}
     dir=${dir%"$2"}