diff --git a/src/adv/Adv.lua b/src/adv/Adv.lua
index 7538fd8..2d36607 100644
--- a/src/adv/Adv.lua
+++ b/src/adv/Adv.lua
@@ -778,7 +778,7 @@ function Adv:over(success, rewardRatio, overType)
 
 	local backAdvCount
 	if not self:isEndless() then
-		backAdvCount = chapterData.limitlevel - self.level
+		backAdvCount = math.floor((chapterData.limitlevel - self.level) / globalCsv.adv_daily_count_back_radio) *  globalCsv.adv_daily_count_back_radio
 		self.owner:changeAdvCount(-backAdvCount)
 	end
 
--
libgit2 0.21.2