diff --git a/src/actions/AdvAction.lua b/src/actions/AdvAction.lua
index acd68ae..bf2ec9f 100644
--- a/src/actions/AdvAction.lua
+++ b/src/actions/AdvAction.lua
@@ -197,6 +197,7 @@ function _M.buyAdvCountRpc(agent , data)
 	if not role:checkItemEnough(cost) then return end
 	role:costItems(cost)
 	role.dailyData:updateProperty({field = "advC", delta = -count})
+	role.dailyData:updateProperty({field = "advBC", delta = count})
 	
 	SendPacket(actionCodes.Adv_buyAdvCountRpc, '')
 	return true
--
libgit2 0.21.2