diff --git a/raft/raft.go b/raft/raft.go
index 235a38b51..ef9b86597 100644
--- a/raft/raft.go
+++ b/raft/raft.go
@@ -1148,6 +1148,8 @@ func stepCandidate(r *raft, m pb.Message) error {
 				r.bcastAppend()
 			}
 		case len(r.votes) - gr:
+			// pb.MsgPreVoteResp contains future term of pre-candidate
+			// m.Term > r.Term; reuse r.Term
 			r.becomeFollower(r.Term, None)
 		}
 	case pb.MsgTimeoutNow: