diff --git a/chatcommands.lua b/chatcommands.lua
index cf025e6..ed25a2b 100644
--- a/chatcommands.lua
+++ b/chatcommands.lua
@@ -48,8 +48,10 @@ end
 core.register_chatcommand(
     "snowball",
     {
-        params = "opt-out|opt-in|hud",
-        description = "Opt-out or opt-in from the snowball games. Hide/show game HUD",
+        --params = "opt-out|opt-in|hud",
+        --description = "Opt-out or opt-in from the snowball games. Hide/show game HUD",
+        params = "opt-out|opt-in",
+        description = "Opt-out or opt-in from the snowball games.",
         privs = {},
         func = function(player_name, param)
             if param == "opt-out" then
@@ -58,9 +60,10 @@ core.register_chatcommand(
             elseif param == "opt-in" then
                 local res = set_player_participation(player_name, true)
                 return true, "You opt-in into snowball games."
-            elseif param == "hud" then
-
+            -- elseif param == "hud" then
+            --     return false, "Not implemented yet, sorry."
             end
+            return false, "Please specify 'opt-in' or 'opt-out' argument."
         end
     }
 )