diff --git a/src/actions/StoreAction.lua b/src/actions/StoreAction.lua
index 64d1b04..102ae73 100644
--- a/src/actions/StoreAction.lua
+++ b/src/actions/StoreAction.lua
@@ -290,6 +290,7 @@ function _M.shopBuyRpc(agent , data)
 		return 1 
 	end
 
+    if dataSet.disount == 0 then dataSet.disount = 10 end
 	local cost = {[dataSet.icon] = math.ceil(dataSet.cost * count * ((dataSet.disount or 10) / 10))}
 
 
--
libgit2 0.21.2