diff --git a/src/actions/DinerAction.lua b/src/actions/DinerAction.lua
index f95418b..dd55b7a 100644
--- a/src/actions/DinerAction.lua
+++ b/src/actions/DinerAction.lua
@@ -40,7 +40,7 @@ function _M.addSellRpc( agent, data )
 		deltaTime = 0,
 		lastCount = 0,
 	}
-	local count = sellData.count
+	local count = sellData.count or 0
 	local maxDishCount = role.dinerData:getMaxDishs()
 	if math.illegalNum(count + calSell.lastCount, 1, maxDishCount) then
 		return 5
--
libgit2 0.21.2