diff --git a/src/adapter/chrome.ts b/src/adapter/chrome.ts
index 600f636..ebfe409 100644
--- a/src/adapter/chrome.ts
+++ b/src/adapter/chrome.ts
@@ -67,16 +67,14 @@ export const createChromeHandler = <TRouter extends AnyRouter>(
 
         sendResponse({
           // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-          error: transformer.output.serialize(
-            getErrorShape({
-              config: router._def._config,
-              error,
-              type: method,
-              path: params.path,
-              input: params.input,
-              ctx,
-            }),
-          ),
+          error: getErrorShape({
+            config: router._def._config,
+            error,
+            type: method,
+            path: params.path,
+            input: params.input,
+            ctx,
+          }),
         });
       };
 
diff --git a/src/adapter/window.ts b/src/adapter/window.ts
index b8a82db..7d7c2c3 100644
--- a/src/adapter/window.ts
+++ b/src/adapter/window.ts
@@ -73,16 +73,14 @@ export const createWindowHandler = <TRouter extends AnyRouter>(
 
       sendResponse({
         // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-        error: transformer.output.serialize(
-          getErrorShape({
-            config: router._def._config,
-            error,
-            type: method,
-            path: params.path,
-            input: params.input,
-            ctx,
-          }),
-        ),
+        error: getErrorShape({
+          config: router._def._config,
+          error,
+          type: method,
+          path: params.path,
+          input: params.input,
+          ctx,
+        }),
       });
     };