diff --git a/readme.md b/readme.md
index 271a778..b467255 100644
--- a/readme.md
+++ b/readme.md
@@ -301,7 +301,7 @@ $ date -j -v+7d                                               # on MacOS
 **STOP USING CALCULATOR WIDGET** :-1:
 
 ```shell
-$ bc
+$ bc -l
 ```
 
 ## force quit a program