diff -r 54eb4c774ef5 -r aa1d71ca6c19 gameServer/HWProtoInRoomState.hs
--- a/gameServer/HWProtoInRoomState.hs	Sun Aug 26 14:59:05 2018 +0200
+++ b/gameServer/HWProtoInRoomState.hs	Sun Aug 26 15:10:34 2018 +0200
@@ -439,7 +439,7 @@
                  [ModifyRoom (\r -> r{greeting = msg}),
                   AnswerClients [sendChan cl]
                       ["CHAT", nickServer,
-                          if msg == "" then
+                          if B.null msg then
                               loc "Greeting message cleared."
                           else
                               loc "Greeting message set."