diff --git a/consensus/state.go b/consensus/state.go
index c5b50d49e..4adb6218d 100644
--- a/consensus/state.go
+++ b/consensus/state.go
@@ -1958,7 +1958,7 @@ func (cs *State) tryAddVote(vote *types.Vote, peerID p2p.ID) (bool, error) {
 			)
 
 			return added, err
-		} else if err == types.ErrVoteNonDeterministicSignature {
+		} else if errors.Is(err, types.ErrVoteNonDeterministicSignature) {
 			cs.Logger.Debug("vote has non-deterministic signature", "err", err)
 		} else {
 			// Either