diff -r 2df519242d41 -r 54eb4c774ef5 gameServer/CommandHelp.hs
--- a/gameServer/CommandHelp.hs	Sun Aug 26 14:37:02 2018 +0200
+++ b/gameServer/CommandHelp.hs	Sun Aug 26 14:59:05 2018 +0200
@@ -45,7 +45,7 @@
     loc "/callvote [arguments]: Start a vote",
     loc "/vote <yes/no>: Vote 'yes' or 'no' for active vote",
     -- For room master only
-    loc "/greeting <message>: Set greeting message to be shown to players who join the room",
+    loc "/greeting [message]: Set or clear greeting message to be shown to players who join the room",
     loc "/delegate <player>: Surrender room control to player",
     loc "/maxteams <N>: Limit maximum number of teams to N"
     ]