diff --git a/commands/mon.py b/commands/mon.py
index 5231abe..bfcf5bf 100644
--- a/commands/mon.py
+++ b/commands/mon.py
@@ -20,8 +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", action="store_true", dest="inside", help="Use x in y logic for matching instead of comparing exact values")
-        self.parser.add_argument("--outside", action="store_false", dest="inside", help="Don't use x in y logic for matching instead of comparing exact values")
+        self.parser.add_argument("--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")
@@ -222,7 +221,13 @@ class Mon:
             for i in obj.real:
                 cast["real"].append(" ".join(i))
         if not obj.inside == None:
-            cast["inside"] = obj.inside
+            if obj.inside.lower() in ["yes", "true", "on"]:
+                cast["inside"] = True
+            elif obj.inside.lower() in ["no", "false", "off"]:
+                cast["inside"] = False
+            else:
+                failure("inside: Unknown operand: %s" % obj.inside)
+                return
         return cast
 
     def subtractCast(self, source, patch, info):