diff --git a/block/block.go b/block/block.go
index 9a16a1c5..3235c567 100644
--- a/block/block.go
+++ b/block/block.go
@@ -50,7 +50,7 @@ type (
 
 		// Transactions returns block's transaction list.
 		Transactions() []Transaction
-		// SetTransaction sets block's transaction list.
+		// SetTransactions sets block's transaction list.
 		SetTransactions([]Transaction)
 	}
 
diff --git a/payload/message.go b/payload/message.go
index a7ed2241..d8ed52db 100644
--- a/payload/message.go
+++ b/payload/message.go
@@ -18,7 +18,7 @@ type (
 		// payload was originated from.
 		ValidatorIndex() uint16
 
-		// SetValidator index sets validator index.
+		// SetValidatorIndex sets validator index.
 		SetValidatorIndex(i uint16)
 
 		Height() uint32
diff --git a/payload/recovery_message.go b/payload/recovery_message.go
index 28eae4ee..117473e8 100644
--- a/payload/recovery_message.go
+++ b/payload/recovery_message.go
@@ -17,7 +17,7 @@ type (
 		GetPrepareRequest(p ConsensusPayload, validators []crypto.PublicKey, primary uint16) ConsensusPayload
 		// GetPrepareResponses returns a slice of PrepareResponse in any order.
 		GetPrepareResponses(p ConsensusPayload, validators []crypto.PublicKey) []ConsensusPayload
-		// GetChangeView returns a slice of ChangeView in any order.
+		// GetChangeViews returns a slice of ChangeView in any order.
 		GetChangeViews(p ConsensusPayload, validators []crypto.PublicKey) []ConsensusPayload
 		// GetCommits returns a slice of Commit in any order.
 		GetCommits(p ConsensusPayload, validators []crypto.PublicKey) []ConsensusPayload