diff --git a/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache
index 8a2ea174fd2..2fa4a62ccf2 100644
--- a/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache
@@ -391,7 +391,7 @@
           }
         } else {
           // All other collection query parameters should be treated as ordinary query parameters.
-          queryParams[key] = this.apiClient.buildCollectionParam(param.value, param.collectionFormat);
+          queryParams[key] = this.buildCollectionParam(param.value, param.collectionFormat);
         }
       }
     }
diff --git a/samples/client/petstore/javascript-promise/src/ApiClient.js b/samples/client/petstore/javascript-promise/src/ApiClient.js
index edf77def335..53f920fb382 100644
--- a/samples/client/petstore/javascript-promise/src/ApiClient.js
+++ b/samples/client/petstore/javascript-promise/src/ApiClient.js
@@ -385,7 +385,7 @@
           }
         } else {
           // All other collection query parameters should be treated as ordinary query parameters.
-          queryParams[key] = this.apiClient.buildCollectionParam(param.value, param.collectionFormat);
+          queryParams[key] = this.buildCollectionParam(param.value, param.collectionFormat);
         }
       }
     }
diff --git a/samples/client/petstore/javascript/src/ApiClient.js b/samples/client/petstore/javascript/src/ApiClient.js
index 2f010c4486f..1c6eefbb71b 100644
--- a/samples/client/petstore/javascript/src/ApiClient.js
+++ b/samples/client/petstore/javascript/src/ApiClient.js
@@ -394,7 +394,7 @@
           }
         } else {
           // All other collection query parameters should be treated as ordinary query parameters.
-          queryParams[key] = this.apiClient.buildCollectionParam(param.value, param.collectionFormat);
+          queryParams[key] = this.buildCollectionParam(param.value, param.collectionFormat);
         }
       }
     }