diff --git a/types/vote.go b/types/vote.go
index 8d24c995e..023bf52f7 100644
--- a/types/vote.go
+++ b/types/vote.go
@@ -27,7 +27,7 @@ var (
 	ErrVoteInvalidBlockHash          = errors.New("invalid block hash")
 	ErrVoteNonDeterministicSignature = errors.New("non-deterministic signature")
 	ErrVoteNil                       = errors.New("nil vote")
-	ErrVoteExtensionAbsent           = errors.New("vote extensions absent")
+	ErrVoteExtensionAbsent           = errors.New("vote extension absent")
 )
 
 type ErrVoteConflictingVotes struct {