diff --git a/sessionmanager/data_it_test.go b/sessionmanager/data_it_test.go
index d8422d118..aecd35abd 100644
--- a/sessionmanager/data_it_test.go
+++ b/sessionmanager/data_it_test.go
@@ -845,7 +845,7 @@ func TestSMGDataLastUsedMultipleDataConstantUsage(t *testing.T) {
 	if err = smgRPC.Call("SMGenericV1.SessionEnd", smgEv, &rpl); err != nil || rpl != utils.OK {
 		t.Error(err)
 	}
-	eAcntVal = 49997767680.000000 // refunded
+	eAcntVal = 49997757440.000000 // 10240 (from the start)
 	if err := smgRPC.Call("ApierV2.GetAccount", attrs, &acnt); err != nil {
 		t.Error(err)
 	} else if acnt.BalanceMap[utils.DATA].GetTotalValue() != eAcntVal {
diff --git a/sessionmanager/smg_session.go b/sessionmanager/smg_session.go
index d1701a905..79160139c 100644
--- a/sessionmanager/smg_session.go
+++ b/sessionmanager/smg_session.go
@@ -90,13 +90,15 @@ func (self *SMGSession) debit(dur time.Duration, lastUsed *time.Duration) (time.
 			// total usage correction
 			self.totalUsage -= self.lastUsage
 			self.totalUsage += *lastUsed
-			//utils.Logger.Debug(fmt.Sprintf("Correction: %f", self.totalUsage.Seconds()))
+			//utils.Logger.Debug(fmt.Sprintf("TotalUsage Correction: %f", self.totalUsage.Seconds()))
 		}
 	}
 	// apply correction from previous run
 	if self.extraDuration < dur {
 		dur -= self.extraDuration
 	} else {
+		self.lastUsage = requestedDuration
+		self.totalUsage += self.lastUsage
 		ccDuration := self.extraDuration // fake ccDuration
 		self.extraDuration -= dur
 		return ccDuration, nil