diff --git a/consensus/moca/proposal.go b/consensus/moca/proposal.go
index ea9226647..2c959735b 100644
--- a/consensus/moca/proposal.go
+++ b/consensus/moca/proposal.go
@@ -85,6 +85,12 @@ func (consensus *Consensus) waitAndHandleProposal() (*election.Election, error)
 				continue
 			}
 
+			err = ledger.TimestampCheck(proposal.Header.Timestamp)
+			if err != nil {
+				log.Warningf("Ignore proposal that fails to pass timestamp check: %v", err)
+				continue
+			}
+
 			err := ledger.SignerCheck(proposal.Header)
 			if err != nil {
 				log.Warningf("Ignore proposal that fails to pass signer check: %v", err)
@@ -114,12 +120,6 @@ func (consensus *Consensus) waitAndHandleProposal() (*election.Election, error)
 				acceptProposal = false
 			}
 
-			err = ledger.TimestampCheck(proposal.Header.Timestamp)
-			if err != nil {
-				log.Warningf("Proposal fails to pass timestamp check: %v", err)
-				acceptProposal = false
-			}
-
 			err = ledger.NextBlockProposerCheck(proposal)
 			if err != nil {
 				log.Warningf("Proposal fails to pass next block proposal check: %v", err)
diff --git a/core/ledger/validator.go b/core/ledger/validator.go
index 0a3718c0a..75f697b10 100644
--- a/core/ledger/validator.go
+++ b/core/ledger/validator.go
@@ -247,8 +247,9 @@ func TimestampCheck(timestamp int64) error {
 	latest := now.Add(TimestampTolerance)
 
 	if t.Before(earliest) || t.After(latest) {
-		return fmt.Errorf("timestamp %d exceed my tolerance [%d, %d]", timestamp, earliest.Unix(), latest.Unix())
+		return fmt.Errorf("timestamp %v exceed my tolerance [%v, %v]", t, earliest, latest)
 	}
+
 	return nil
 }