diff --git a/packages/assets-controllers/CHANGELOG.md b/packages/assets-controllers/CHANGELOG.md
index c26f47a307..8b5b1debc7 100644
--- a/packages/assets-controllers/CHANGELOG.md
+++ b/packages/assets-controllers/CHANGELOG.md
@@ -66,6 +66,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [109.3.1]
 
+### Added
+
+- Add DeFi Oracle Meta Mainnet (`138`/`0x8a`) to token autodetection allowlists for `SupportedTokenDetectionNetworks` and `SUPPORTED_NETWORKS_ACCOUNTS_API_V4` ([#9297](https://github.com/MetaMask/core/pull/9297))
+
 ### Changed
 
 - Bump `@metamask/messenger` from `^1.2.0` to `^2.0.0` ([#9392](https://github.com/MetaMask/core/pull/9392))
diff --git a/packages/assets-controllers/src/assetsUtil.test.ts b/packages/assets-controllers/src/assetsUtil.test.ts
index 509057f10d..82d8f9d570 100644
--- a/packages/assets-controllers/src/assetsUtil.test.ts
+++ b/packages/assets-controllers/src/assetsUtil.test.ts
@@ -10,6 +10,7 @@ import type { Hex } from '@metamask/utils';
 
 import * as assetsUtil from './assetsUtil.js';
 import { TOKEN_PRICES_BATCH_SIZE } from './assetsUtil.js';
+import { SUPPORTED_NETWORKS_ACCOUNTS_API_V4 } from './constants.js';
 import type { Nft, NftMetadata } from './NftController.js';
 import { EvmAssetWithMarketData } from './token-prices-service/abstract-token-prices-service.js';
 import { getNativeTokenAddress } from './token-prices-service/index.js';
@@ -273,6 +274,20 @@ describe('assetsUtil', () => {
       ).toBe(true);
     });
 
+    it('returns true for DeFi Oracle Meta Mainnet (138)', () => {
+      expect(
+        assetsUtil.isTokenDetectionSupportedForNetwork(
+          assetsUtil.SupportedTokenDetectionNetworks.DefiOracleMeta,
+        ),
+      ).toBe(true);
+    });
+
+    it('includes DeFi Oracle Meta Mainnet in the Accounts API v4 allowlist', () => {
+      expect(SUPPORTED_NETWORKS_ACCOUNTS_API_V4).toContain(
+        assetsUtil.SupportedTokenDetectionNetworks.DefiOracleMeta,
+      );
+    });
+
     it('returns false for testnets such as Goerli', () => {
       expect(assetsUtil.isTokenDetectionSupportedForNetwork(toHex(5))).toBe(
         false,
diff --git a/packages/assets-controllers/src/assetsUtil.ts b/packages/assets-controllers/src/assetsUtil.ts
index 947968c07e..e35ce92553 100644
--- a/packages/assets-controllers/src/assetsUtil.ts
+++ b/packages/assets-controllers/src/assetsUtil.ts
@@ -165,6 +165,7 @@ export enum SupportedTokenDetectionNetworks {
   Hyperevm = '0x3e7', // decimal: 999
   Arc = '0x13b2', // decimal: 5042
   Robinhood = '0x1237', // decimal: 4663
+  DefiOracleMeta = '0x8a', // decimal: 138 — DeFi Oracle Meta Mainnet
 }
 
 /**
diff --git a/packages/assets-controllers/src/constants.ts b/packages/assets-controllers/src/constants.ts
index d1cbbbdb03..b356dfe730 100644
--- a/packages/assets-controllers/src/constants.ts
+++ b/packages/assets-controllers/src/constants.ts
@@ -22,6 +22,7 @@ export const SUPPORTED_NETWORKS_ACCOUNTS_API_V4 = [
   '0x3e7', // 999 HyperEVM
   '0x13b2', // 5042 Arc
   '0x1237', // 4663 Robinhood
+  '0x8a', // 138 DeFi Oracle Meta Mainnet
 ];
 
 /** Lowercase ERC-20 address for MetaMask USD (mUSD), same contract on listed chains. */