diff --git a/dcrutil/block.go b/dcrutil/block.go
index c49ff2d3..9d22586c 100644
--- a/dcrutil/block.go
+++ b/dcrutil/block.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2016 The btcsuite developers
-// Copyright (c) 2015-2016 The Decred developers
+// Copyright (c) 2015-2019 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -75,26 +75,19 @@ func (b *Block) Bytes() ([]byte, error) {
 	return serializedBlock, nil
 }
 
-// BlockHeaderBytes returns the serialized bytes for the Block's header.  This is
-// equivalent to calling Serialize on the underlying wire.MsgBlock, but it
-// returns a byte slice.
+// BlockHeaderBytes returns the serialized bytes for the Block's header.  This
+// is equivalent to calling Serialize on the underlying wire.MsgBlock.Header,
+// but it returns a byte slice.
 func (b *Block) BlockHeaderBytes() ([]byte, error) {
-	// Return the cached serialized bytes if it has already been generated.
-	if len(b.serializedBlock) != 0 {
-		return b.serializedBlock, nil
-	}
-
-	// Serialize the MsgBlock.
+	// Serialize the BlockHeader.
 	var w bytes.Buffer
 	w.Grow(wire.MaxBlockHeaderPayload)
 	err := b.msgBlock.Header.Serialize(&w)
 	if err != nil {
 		return nil, err
 	}
-	serializedBlockHeader := w.Bytes()
 
-	// Cache the serialized bytes and return them.
-	return serializedBlockHeader, nil
+	return w.Bytes(), nil
 }
 
 // Hash returns the block identifier hash for the Block.  This is equivalent to
diff --git a/dcrutil/block_test.go b/dcrutil/block_test.go
index 47d45301..032877cc 100644
--- a/dcrutil/block_test.go
+++ b/dcrutil/block_test.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2013-2016 The btcsuite developers
-// Copyright (c) 2015-2016 The Decred developers
+// Copyright (c) 2015-2019 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -144,6 +144,28 @@ func TestBlock(t *testing.T) {
 		}
 	}
 
+	// Serialize the test block's header.
+	var block100000HeaderBuf bytes.Buffer
+	block100000HeaderBuf.Grow(wire.MaxBlockHeaderPayload)
+	err = Block100000.Header.Serialize(&block100000HeaderBuf)
+	if err != nil {
+		t.Errorf("Serialize: %v", err)
+	}
+	block100000HeaderBytes := block100000HeaderBuf.Bytes()
+
+	// Request serialized header bytes after the previous calls to block.Bytes
+	// to ensure the correct bytes are returned (not the cached copy of the full
+	// serialized block).
+	serializedHeaderBytes, err := b.BlockHeaderBytes()
+	if err != nil {
+		t.Errorf("Bytes: %v", err)
+	}
+	if !bytes.Equal(serializedHeaderBytes, block100000HeaderBytes) {
+		t.Errorf("BlockHeaderBytes wrong bytes - got %v, want %v",
+			spew.Sdump(serializedHeaderBytes),
+			spew.Sdump(block100000HeaderBytes))
+	}
+
 	// Transaction offsets and length for the transaction in Block100000.
 	wantTxLocs := []wire.TxLoc{
 		{TxStart: 181, TxLen: 159},