diff --git a/includes/install/scripts/conference_center.lua b/includes/install/scripts/conference_center.lua
index 4f033d5758..56298e1f7a 100644
--- a/includes/install/scripts/conference_center.lua
+++ b/includes/install/scripts/conference_center.lua
@@ -252,15 +252,17 @@
 
 			--set a conference parameter
 				if (max_members ~= nil) then
-					--max members must be 2 or more
-					session:execute("set","conference_max_members="..max_members);
-					if (conference_exists) then
-						cmd = "conference "..meeting_uuid.."-"..domain_name.." get count";
-						count = trim(api:executeString(cmd));
-						if (count ~= nil) then
-							if (tonumber(count) >= tonumber(max_members)) then
-								session:execute("playback", sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/conference/conf-locked.wav");
-								session:hangup("CALL_REJECTED");
+					if (tonumber(max_members) > 0) then
+						--max members must be 2 or more
+						session:execute("set","conference_max_members="..max_members);
+						if (conference_exists) then
+							cmd = "conference "..meeting_uuid.."-"..domain_name.." get count";
+							count = trim(api:executeString(cmd));
+							if (count ~= nil) then
+								if (tonumber(count) >= tonumber(max_members)) then
+									session:execute("playback", sounds_dir.."/"..default_language.."/"..default_dialect.."/"..default_voice.."/conference/conf-locked.wav");
+									session:hangup("CALL_REJECTED");
+								end
 							end
 						end
 					end