diff --git a/packages/rtk-query-codegen-openapi/src/generate.ts b/packages/rtk-query-codegen-openapi/src/generate.ts
index 9c5c00c158..37fd77af48 100644
--- a/packages/rtk-query-codegen-openapi/src/generate.ts
+++ b/packages/rtk-query-codegen-openapi/src/generate.ts
@@ -26,6 +26,9 @@ import ts from 'typescript';
 const generatedApiName = 'injectedRtkApi';
 
 function defaultIsDataResponse(code: string) {
+  if (code === "default") {
+    return true;
+  }
   const parsedCode = Number(code);
   return !Number.isNaN(parsedCode) && parsedCode >= 200 && parsedCode < 300;
 }
@@ -234,6 +237,7 @@ export async function generateApi(
             ] as const
         )
         .filter(([status, response]) => isDataResponse(status, apiGen.resolve(response), responses || {}))
+        .filter(([_1, _2, type]) => type !== keywordType.void)
         .map(([code, response, type]) =>
           ts.addSyntheticLeadingComment(
             { ...type },
@@ -241,8 +245,7 @@ export async function generateApi(
             `* status ${code} ${response.description} `,
             false
           )
-        )
-        .filter((type) => type !== keywordType.void);
+        );
       if (returnTypes.length > 0) {
         ResponseType = factory.createUnionTypeNode(returnTypes);
       }
diff --git a/packages/rtk-query-codegen-openapi/test/__snapshots__/cli.test.ts.snap b/packages/rtk-query-codegen-openapi/test/__snapshots__/cli.test.ts.snap
index c91144ad08..292f58714c 100644
--- a/packages/rtk-query-codegen-openapi/test/__snapshots__/cli.test.ts.snap
+++ b/packages/rtk-query-codegen-openapi/test/__snapshots__/cli.test.ts.snap
@@ -143,7 +143,7 @@ export type DeleteOrderApiArg = {
   /** ID of the order that needs to be deleted */
   orderId: number;
 };
-export type CreateUserApiResponse = unknown;
+export type CreateUserApiResponse = /** status default successful operation */ User;
 export type CreateUserApiArg = {
   /** Created user object */
   user: User;
@@ -363,7 +363,7 @@ export type DeleteOrderApiArg = {
   /** ID of the order that needs to be deleted */
   orderId: number;
 };
-export type CreateUserApiResponse = unknown;
+export type CreateUserApiResponse = /** status default successful operation */ User;
 export type CreateUserApiArg = {
   /** Created user object */
   user: User;
diff --git a/packages/rtk-query-codegen-openapi/test/__snapshots__/generateEndpoints.test.ts.snap b/packages/rtk-query-codegen-openapi/test/__snapshots__/generateEndpoints.test.ts.snap
index a88a4786d1..9e4de46937 100644
--- a/packages/rtk-query-codegen-openapi/test/__snapshots__/generateEndpoints.test.ts.snap
+++ b/packages/rtk-query-codegen-openapi/test/__snapshots__/generateEndpoints.test.ts.snap
@@ -186,7 +186,7 @@ export type DeleteOrderApiArg = {
   /** ID of the order that needs to be deleted */
   orderId: number;
 };
-export type CreateUserApiResponse = unknown;
+export type CreateUserApiResponse = /** status default successful operation */ User;
 export type CreateUserApiArg = {
   /** Created user object */
   user: User;
@@ -1031,7 +1031,7 @@ export type DeleteOrderApiArg = {
   /** ID of the order that needs to be deleted */
   orderId: number;
 };
-export type CreateUserApiResponse = unknown;
+export type CreateUserApiResponse = /** status default successful operation */ User;
 export type CreateUserApiArg = {
   /** Created user object */
   user: User;
@@ -1389,7 +1389,7 @@ export type DeleteOrderApiArg = {
   /** ID of the order that needs to be deleted */
   orderId: number;
 };
-export type CreateUserApiResponse = unknown;
+export type CreateUserApiResponse = /** status default successful operation */ User;
 export type CreateUserApiArg = {
   /** Created user object */
   user: User;
diff --git a/packages/rtk-query-codegen-openapi/test/generateEndpoints.test.ts b/packages/rtk-query-codegen-openapi/test/generateEndpoints.test.ts
index d922e7ff55..a904840c00 100644
--- a/packages/rtk-query-codegen-openapi/test/generateEndpoints.test.ts
+++ b/packages/rtk-query-codegen-openapi/test/generateEndpoints.test.ts
@@ -22,6 +22,15 @@ test('calling without `outputFile` returns the generated api', async () => {
   expect(api).toMatchSnapshot();
 });
 
+test('should set response type for request with default response type', async () => {
+  const api = await generateEndpoints({
+    apiFile: './fixtures/emptyApi.ts',
+    schemaFile: resolve(__dirname, 'fixtures/petstore.json'),
+  });
+  // eslint-disable-next-line no-template-curly-in-string
+  expect(api).toMatch(/export type CreateUserApiResponse =[\s\S/*]+status default successful operation[\s/*]+User;/);
+});
+
 test('endpoint filtering', async () => {
   const api = await generateEndpoints({
     unionUndefined: true,