diff --git a/legendary/cli.py b/legendary/cli.py
index 9cdff52..d3c4dcd 100644
--- a/legendary/cli.py
+++ b/legendary/cli.py
@@ -856,7 +856,7 @@ def main():
 
     # general arguments
     parser.add_argument('-v', dest='debug', action='store_true', help='Set loglevel to debug')
-    parser.add_argument('-y', dest='yes', action='store_true', help='Default to yes for all prompts')
+    parser.add_argument('-y', '--yes', dest='yes', action='store_true', help='Default to yes for all prompts')
     parser.add_argument('-V', dest='version', action='store_true', help='Print version and exit')
 
     # all the commands