diff --git a/packages/block/src/constructors.ts b/packages/block/src/constructors.ts
index 8152f6323e..2b6094326c 100644
--- a/packages/block/src/constructors.ts
+++ b/packages/block/src/constructors.ts
@@ -522,12 +522,15 @@ export function createSealedCliqueBlock(
   cliqueSigner: Uint8Array,
   opts: BlockOptions = {},
 ): Block {
-  const sealedCliqueBlock = createBlock(blockData, opts)
+  const sealedCliqueBlock = createBlock(blockData, { ...opts, ...{ freeze: false } })
   ;(sealedCliqueBlock.header.extraData as any) = retrieveCliqueBlockExtraData(
     sealedCliqueBlock.header,
     cliqueSigner,
   )
-
+  if (opts?.freeze === true) {
+    // We have to freeze here since we can't freeze the block when constructing it since we are overwriting `extraData`
+    Object.freeze(sealedCliqueBlock)
+  }
   return sealedCliqueBlock
 }
 
diff --git a/packages/blockchain/test/clique.spec.ts b/packages/blockchain/test/clique.spec.ts
index d16578ac1f..f4307ac872 100644
--- a/packages/blockchain/test/clique.spec.ts
+++ b/packages/blockchain/test/clique.spec.ts
@@ -159,7 +159,7 @@ function getBlock(
   // set signer
   const cliqueSigner = signer.privateKey
 
-  return createSealedCliqueBlock(blockData, cliqueSigner, { common, freeze: false })
+  return createSealedCliqueBlock(blockData, cliqueSigner, { common })
 }
 
 const addNextBlockReorg = async (
@@ -230,6 +230,7 @@ describe('Clique: Initialization', () => {
     )
     const block = createSealedCliqueBlock({ header: { number, extraData } }, A.privateKey, {
       common: COMMON,
+      freeze: false,
     })
     try {
       await blockchain.putBlock(block)