diff --git a/packages/bitcoin-wallet-snap/CHANGELOG.md b/packages/bitcoin-wallet-snap/CHANGELOG.md
index 570452d8e..5908ee56b 100644
--- a/packages/bitcoin-wallet-snap/CHANGELOG.md
+++ b/packages/bitcoin-wallet-snap/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Ensure certain errors are stringified correctly ([#179](https://github.com/MetaMask/internal-snaps/pull/179))
+
 ## [2.0.1]
 
 ### Fixed
diff --git a/packages/bitcoin-wallet-snap/snap.manifest.json b/packages/bitcoin-wallet-snap/snap.manifest.json
index f594f203d..d59b88aac 100644
--- a/packages/bitcoin-wallet-snap/snap.manifest.json
+++ b/packages/bitcoin-wallet-snap/snap.manifest.json
@@ -7,7 +7,7 @@
     "url": "https://github.com/MetaMask/internal-snaps.git"
   },
   "source": {
-    "shasum": "jV649WZbbfbj3FpOMD5U/xDPuRD0t4F+pxCoy08a/O0=",
+    "shasum": "sYefpN30aR0fb7v2DtdJ+jNFSnJJX5jtqvdsDof4RHQ=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",
diff --git a/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.test.ts b/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.test.ts
index d0734fc17..8ca6d59d7 100644
--- a/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.test.ts
+++ b/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.test.ts
@@ -103,6 +103,16 @@ describe('HandlerMiddleware', () => {
       expect(mockLogger.error).toHaveBeenCalledWith(thrown);
     });
 
+    it('uses the message property if it exists on a thrown plain object', async () => {
+      const thrown = { message: 'InsufficientFunds', code: 11 };
+      const mockFn = jest.fn().mockRejectedValue(thrown);
+
+      await expect(middleware.handle(mockFn)).rejects.toThrow(
+        'InsufficientFunds',
+      );
+      expect(mockLogger.error).toHaveBeenCalledWith(thrown);
+    });
+
     it('handles error successfully if instance of BaseError', async () => {
       const error = new BaseError('Test error', 1);
       const mockFn = jest.fn().mockRejectedValue(error);
diff --git a/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.ts b/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.ts
index 6d83d6844..99faf8df2 100644
--- a/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.ts
+++ b/packages/bitcoin-wallet-snap/src/handlers/HandlerMiddleware.ts
@@ -8,6 +8,7 @@ import {
   UnauthorizedError,
   UserRejectedRequestError,
   SnapError,
+  getErrorMessage,
 } from '@metamask/snaps-sdk';
 import { StructError } from 'superstruct';
 
@@ -138,7 +139,9 @@ export class HandlerMiddleware {
         // string, making cross-boundary errors like KeyringControllerError
         // opaque in Sentry).
         this.#logger.error(error);
-        throw new SnapError(error instanceof Error ? error : String(error));
+        throw new SnapError(
+          error instanceof Error ? error : getErrorMessage(error),
+        );
       }
     }
   }