diff --git a/.changeset/fix-middleware-onerror-docs.md b/.changeset/fix-middleware-onerror-docs.md
new file mode 100644
index 000000000..0c1804ab4
--- /dev/null
+++ b/.changeset/fix-middleware-onerror-docs.md
@@ -0,0 +1,7 @@
+---
+"openapi-fetch": patch
+---
+
+Fix incorrect `onError` middleware docs example that caused a TypeScript error when copy-pasted.
+
+
diff --git a/docs/openapi-fetch/api.md b/docs/openapi-fetch/api.md
index 8a9202f11..28e316caf 100644
--- a/docs/openapi-fetch/api.md
+++ b/docs/openapi-fetch/api.md
@@ -242,9 +242,7 @@ const myMiddleware: Middleware = {
   },
   async onError({ error }) {
     // wrap errors thrown by fetch
-    onError({ error }) {
-      return new Error("Oops, fetch failed", { cause: error });
-    },
+    return new Error("Oops, fetch failed", { cause: error });
   },
 };
 
diff --git a/docs/openapi-fetch/middleware-auth.md b/docs/openapi-fetch/middleware-auth.md
index 7a0e53967..d016139e1 100644
--- a/docs/openapi-fetch/middleware-auth.md
+++ b/docs/openapi-fetch/middleware-auth.md
@@ -29,9 +29,7 @@ const myMiddleware: Middleware = {
   },
   async onError({ error }) {
     // wrap errors thrown by fetch
-    onError({ error }) {
-      return new Error("Oops, fetch failed", { cause: error });
-    },
+    return new Error("Oops, fetch failed", { cause: error });
   },
 };