diff --git a/types/dym_header.go b/types/dym_header.go
index e09ef2eee..762b8e9b3 100644
--- a/types/dym_header.go
+++ b/types/dym_header.go
@@ -22,11 +22,7 @@ func MakeDymHeader(consMessages []*proto.Any) DymHeader {
 	}
 }
 
-func (h *Header) SetDymHeader(dh DymHeader) {
-	h.ConsensusMessagesHash = dh.ConsensusMessagesHash
-}
-
-func (h *Header) DymHash() cmtbytes.HexBytes {
+func (h DymHeader) Hash() cmtbytes.HexBytes {
 	// 32 bytes long
 	return merkle.HashFromByteSlices([][]byte{
 		h.ConsensusMessagesHash[:],
@@ -34,6 +30,16 @@ func (h *Header) DymHash() cmtbytes.HexBytes {
 	})
 }
 
+func (h *Header) SetDymHeader(dh DymHeader) {
+	h.ConsensusMessagesHash = dh.ConsensusMessagesHash
+}
+
+func (h *Header) DymHash() cmtbytes.HexBytes {
+	return DymHeader{
+		ConsensusMessagesHash: h.ConsensusMessagesHash,
+	}.Hash()
+}
+
 func dymHashFr(blocks []*Block) cmtbytes.HexBytes {
 	// 32 bytes long
 	bzz := make([][]byte, len(blocks))
diff --git a/types/validation.go b/types/validation.go
index b11cf5466..33354b225 100644
--- a/types/validation.go
+++ b/types/validation.go
@@ -50,8 +50,9 @@ func (b *Block) ValidateBasic() error {
 }
 
 func (b *Block) validateDymHeader() error {
-	if !bytes.Equal(b.Header.DymHash(), NewDymHeader(b.Data.ConsensusMessages).Hash()) {
-	if !bytes.Equal(b.Header.Dym.Hash(), NewDymHeader(b.Data.ConsensusMessages).Hash()) {
+	exp := b.Header.DymHash()
+	got := MakeDymHeader(b.Data.ConsensusMessages).Hash()
+	if !bytes.Equal(exp, got) {
 		return ErrInvalidDymHeaderHash
 	}
 	return nil
@@ -114,9 +115,6 @@ func (h *Header) ValidateBasic() error {
 	if len(h.ProposerAddress) == 0 {
 		return ErrEmptyProposerAddress
 	}
-	if err := h.Dym.ValidateBasic(); err != nil {
-		return fmt.Errorf("dym header: %w", err)
-	}
 
 	return nil
 }