diff --git a/commands/mon.py b/commands/mon.py
index bfcf5bf..214b363 100644
--- a/commands/mon.py
+++ b/commands/mon.py
@@ -20,7 +20,7 @@ class Mon:
         group2.add_argument("-p", "--append", action="store_true", dest="doAppend", help="Append entries to lists instead of replacing")
         group2.add_argument("-r", "--remove", action="store_true", dest="doRemove", help="Remove entries in lists instead of replacing")
 
-        self.parser.add_argument("--inside", dest="inside", help="Use x in y logic for matching instead of comparing exact values")
+        self.parser.add_argument("--inside", metavar="inside", dest="inside", help="Use x in y logic for matching instead of comparing exact values")
 
         self.parser.add_argument("--type", nargs="*", metavar="type", dest="specType", help="Specify type of spec matching. Available types: join, part, quit, msg, topic, mode, nick, kick, notice, action, who")
         self.parser.add_argument("--free", nargs="*", metavar="query", dest="free", help="Use freeform matching")