diff --git a/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache b/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache
index e0498e0e316..8df16e9074e 100644
--- a/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache
@@ -79,8 +79,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts b/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts
index be992e2dac8..6924269e546 100644
--- a/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/default/runtime.ts b/samples/client/petstore/typescript-fetch/builds/default/runtime.ts
index 20374a38659..8ae5f65348c 100644
--- a/samples/client/petstore/typescript-fetch/builds/default/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/default/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts b/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts
index d558d0ad7de..c4d82bccb8f 100644
--- a/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts
index 20374a38659..8ae5f65348c 100644
--- a/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts b/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts
index 20374a38659..8ae5f65348c 100644
--- a/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts
index 20374a38659..8ae5f65348c 100644
--- a/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/typescript-three-plus/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/typescript-three-plus/src/runtime.ts
index 95601f9e307..40ac35e9d19 100644
--- a/samples/client/petstore/typescript-fetch/builds/typescript-three-plus/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/typescript-three-plus/src/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts b/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts
index 20374a38659..8ae5f65348c 100644
--- a/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts
index 20374a38659..8ae5f65348c 100644
--- a/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }
diff --git a/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts
index 20374a38659..8ae5f65348c 100644
--- a/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts
@@ -90,8 +90,8 @@ export class BaseAPI {
             if (middleware.post) {
                 response = await middleware.post({
                     fetch: this.fetchApi,
-                    url,
-                    init,
+                    url: fetchParams.url,
+                    init: fetchParams.init,
                     response: response.clone(),
                 }) || response;
             }