diff --git a/modules/openapi-generator/src/main/resources/typescript-rxjs/apis.mustache b/modules/openapi-generator/src/main/resources/typescript-rxjs/apis.mustache
index 3c548d7b547..0c70dc5e6ca 100644
--- a/modules/openapi-generator/src/main/resources/typescript-rxjs/apis.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-rxjs/apis.mustache
@@ -86,7 +86,7 @@ export class {{classname}} extends BaseAPI {
 
         {{/hasHttpHeaders}}
         {{#hasQueryParams}}
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             {{#queryParams}}
             {{#isListContainer}}
             {{#isCollectionFormatMulti}}
diff --git a/samples/client/petstore/typescript-rxjs/builds/default/apis/PetApi.ts b/samples/client/petstore/typescript-rxjs/builds/default/apis/PetApi.ts
index a5328a8c728..16c0d116369 100644
--- a/samples/client/petstore/typescript-rxjs/builds/default/apis/PetApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/default/apis/PetApi.ts
@@ -123,7 +123,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.status && { 'status': requestParameters.status.join(COLLECTION_FORMATS['csv']) }),
         };
 
@@ -151,7 +151,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.tags && { 'tags': requestParameters.tags.join(COLLECTION_FORMATS['csv']) }),
         };
 
diff --git a/samples/client/petstore/typescript-rxjs/builds/default/apis/UserApi.ts b/samples/client/petstore/typescript-rxjs/builds/default/apis/UserApi.ts
index 2194fdfe9f6..ed3aaa8e371 100644
--- a/samples/client/petstore/typescript-rxjs/builds/default/apis/UserApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/default/apis/UserApi.ts
@@ -139,7 +139,7 @@ export class UserApi extends BaseAPI {
         throwIfRequired(requestParameters, 'username', 'loginUser');
         throwIfRequired(requestParameters, 'password', 'loginUser');
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.username && { 'username': requestParameters.username }),
             ...(requestParameters.password && { 'password': requestParameters.password }),
         };
diff --git a/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/PetApi.ts b/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/PetApi.ts
index a5328a8c728..16c0d116369 100644
--- a/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/PetApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/PetApi.ts
@@ -123,7 +123,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.status && { 'status': requestParameters.status.join(COLLECTION_FORMATS['csv']) }),
         };
 
@@ -151,7 +151,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.tags && { 'tags': requestParameters.tags.join(COLLECTION_FORMATS['csv']) }),
         };
 
diff --git a/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/UserApi.ts b/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/UserApi.ts
index 2194fdfe9f6..ed3aaa8e371 100644
--- a/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/UserApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/es6-target/apis/UserApi.ts
@@ -139,7 +139,7 @@ export class UserApi extends BaseAPI {
         throwIfRequired(requestParameters, 'username', 'loginUser');
         throwIfRequired(requestParameters, 'password', 'loginUser');
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.username && { 'username': requestParameters.username }),
             ...(requestParameters.password && { 'password': requestParameters.password }),
         };
diff --git a/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/PetApi.ts b/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/PetApi.ts
index a5328a8c728..16c0d116369 100644
--- a/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/PetApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/PetApi.ts
@@ -123,7 +123,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.status && { 'status': requestParameters.status.join(COLLECTION_FORMATS['csv']) }),
         };
 
@@ -151,7 +151,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.tags && { 'tags': requestParameters.tags.join(COLLECTION_FORMATS['csv']) }),
         };
 
diff --git a/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/UserApi.ts b/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/UserApi.ts
index 2194fdfe9f6..ed3aaa8e371 100644
--- a/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/UserApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/with-interfaces/apis/UserApi.ts
@@ -139,7 +139,7 @@ export class UserApi extends BaseAPI {
         throwIfRequired(requestParameters, 'username', 'loginUser');
         throwIfRequired(requestParameters, 'password', 'loginUser');
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.username && { 'username': requestParameters.username }),
             ...(requestParameters.password && { 'password': requestParameters.password }),
         };
diff --git a/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/PetApi.ts b/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/PetApi.ts
index a5328a8c728..16c0d116369 100644
--- a/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/PetApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/PetApi.ts
@@ -123,7 +123,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.status && { 'status': requestParameters.status.join(COLLECTION_FORMATS['csv']) }),
         };
 
@@ -151,7 +151,7 @@ export class PetApi extends BaseAPI {
             }),
         };
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.tags && { 'tags': requestParameters.tags.join(COLLECTION_FORMATS['csv']) }),
         };
 
diff --git a/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/UserApi.ts b/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/UserApi.ts
index 2194fdfe9f6..ed3aaa8e371 100644
--- a/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/UserApi.ts
+++ b/samples/client/petstore/typescript-rxjs/builds/with-npm-version/apis/UserApi.ts
@@ -139,7 +139,7 @@ export class UserApi extends BaseAPI {
         throwIfRequired(requestParameters, 'username', 'loginUser');
         throwIfRequired(requestParameters, 'password', 'loginUser');
 
-        const query: HttpQuery = {
+        const query: HttpQuery = <HttpQuery>{
             ...(requestParameters.username && { 'username': requestParameters.username }),
             ...(requestParameters.password && { 'password': requestParameters.password }),
         };