diff -r c4f9469b203f -r 6dc1aeefa876 plugins/muc/mod_muc.lua
--- a/plugins/muc/mod_muc.lua	Tue Aug 21 19:48:08 2018 +0200
+++ b/plugins/muc/mod_muc.lua	Wed Aug 22 14:50:07 2018 +0200
@@ -450,9 +450,9 @@
 			else
 				return;
 			end
-                elseif room == false then -- Error loading room
-                        origin.send(st.error_reply(stanza, "wait", "resource-constraint"));
-                        return true;
+		elseif room == false then -- Error loading room
+			origin.send(st.error_reply(stanza, "wait", "resource-constraint"));
+			return true;
 		end
 		return room[method](room, origin, stanza);
 	end, -2)