diff --git a/packages/transaction-controller/src/types.ts b/packages/transaction-controller/src/types.ts
index 5cf4544d57c..e6a29685607 100644
--- a/packages/transaction-controller/src/types.ts
+++ b/packages/transaction-controller/src/types.ts
@@ -430,6 +430,12 @@ export interface TransactionParams {
    * Value associated with this transaction.
    */
   value?: string;
+
+  /**
+   * Type of transaction.
+   * 0x0 indicates a legacy transaction.
+   */
+  type?: string;
 }
 
 /**
diff --git a/packages/transaction-controller/src/utils.test.ts b/packages/transaction-controller/src/utils.test.ts
index d0932826a18..d54d47ddc8d 100644
--- a/packages/transaction-controller/src/utils.test.ts
+++ b/packages/transaction-controller/src/utils.test.ts
@@ -19,8 +19,8 @@ describe('utils', () => {
     jest.clearAllMocks();
   });
 
-  it('normalizeTxParams', () => {
-    const normalized = util.normalizeTxParams({
+  describe('normalizeTxParams', () => {
+    const commonInput = {
       data: 'data',
       from: 'FROM',
       gas: 'gas',
@@ -31,18 +31,43 @@ describe('utils', () => {
       maxFeePerGas: 'maxFeePerGas',
       maxPriorityFeePerGas: 'maxPriorityFeePerGas',
       estimatedBaseFee: 'estimatedBaseFee',
+    };
+
+    it('normalizeTransaction', () => {
+      const normalized = util.normalizeTxParams({
+        ...commonInput,
+      });
+      expect(normalized).toStrictEqual({
+        data: '0xdata',
+        from: '0xfrom',
+        gas: '0xgas',
+        gasPrice: '0xgasPrice',
+        nonce: '0xnonce',
+        to: '0xto',
+        value: '0xvalue',
+        maxFeePerGas: '0xmaxFeePerGas',
+        maxPriorityFeePerGas: '0xmaxPriorityFeePerGas',
+        estimatedBaseFee: '0xestimatedBaseFee',
+      });
     });
-    expect(normalized).toStrictEqual({
-      data: '0xdata',
-      from: '0xfrom',
-      gas: '0xgas',
-      gasPrice: '0xgasPrice',
-      nonce: '0xnonce',
-      to: '0xto',
-      value: '0xvalue',
-      maxFeePerGas: '0xmaxFeePerGas',
-      maxPriorityFeePerGas: '0xmaxPriorityFeePerGas',
-      estimatedBaseFee: '0xestimatedBaseFee',
+    it('normalizeTransaction if type is zero', () => {
+      const normalized = util.normalizeTxParams({
+        ...commonInput,
+        type: '0x0',
+      });
+      expect(normalized).toStrictEqual({
+        data: '0xdata',
+        from: '0xfrom',
+        gas: '0xgas',
+        gasPrice: '0xgasPrice',
+        nonce: '0xnonce',
+        to: '0xto',
+        value: '0xvalue',
+        maxFeePerGas: '0xmaxFeePerGas',
+        maxPriorityFeePerGas: '0xmaxPriorityFeePerGas',
+        estimatedBaseFee: '0xestimatedBaseFee',
+        type: '0x0',
+      });
     });
   });
 
diff --git a/packages/transaction-controller/src/utils.ts b/packages/transaction-controller/src/utils.ts
index 7bab7d91e44..13dd009818d 100644
--- a/packages/transaction-controller/src/utils.ts
+++ b/packages/transaction-controller/src/utils.ts
@@ -28,6 +28,7 @@ const NORMALIZERS: { [param in keyof TransactionParams]: any } = {
     addHexPrefix(maxPriorityFeePerGas),
   estimatedBaseFee: (maxPriorityFeePerGas: string) =>
     addHexPrefix(maxPriorityFeePerGas),
+  type: (type: string) => (type === '0x0' ? '0x0' : undefined),
 };
 
 /**