diff --git a/raft/raft.go b/raft/raft.go
index d289de6a1..f408a326b 100644
--- a/raft/raft.go
+++ b/raft/raft.go
@@ -611,6 +611,7 @@ func (r *raft) becomePreCandidate() {
 	// but doesn't change anything else. In particular it does not increase
 	// r.Term or change r.Vote.
 	r.step = stepCandidate
+	r.votes = make(map[uint64]bool)
 	r.tick = r.tickElection
 	r.state = StatePreCandidate
 	r.logger.Infof("%x became pre-candidate at term %d", r.id, r.Term)