diff -r 3edfa6b68407 -r 05a5762ab12c gameServer/HWProtoLobbyState.hs
--- a/gameServer/HWProtoLobbyState.hs	Thu Jun 19 23:32:11 2014 +0400
+++ b/gameServer/HWProtoLobbyState.hs	Mon Jun 23 22:22:29 2014 +0400
@@ -64,7 +64,7 @@
     return $
         if isNothing maybeRI then
             [Warning $ loc "No such room"]
-            else if not sameProto then
+            else if (not sameProto) && (not $ isAdministrator cl) then
             [Warning $ loc "Room version incompatible to your hedgewars version"]
             else if isRestrictedJoins jRoom then
             [Warning $ loc "Joining restricted"]