diff --git a/lualib/skynet/multicast.lua b/lualib/skynet/multicast.lua
index 4b09044f..21ebf974 100644
--- a/lualib/skynet/multicast.lua
+++ b/lualib/skynet/multicast.lua
@@ -73,6 +73,8 @@ function chan:unsubscribe()
 end
 
 local function dispatch_subscribe(channel, source, pack, msg, sz)
+	-- channel as session, do need response
+	skynet.ignoreret()
 	local self = dispatch[channel]
 	if not self then
 		mc.close(pack)