diff --git a/src/main/resources/handlebars/typescript-angular/api.service.mustache b/src/main/resources/handlebars/typescript-angular/api.service.mustache
index 93fa863aff..6976139da0 100644
--- a/src/main/resources/handlebars/typescript-angular/api.service.mustache
+++ b/src/main/resources/handlebars/typescript-angular/api.service.mustache
@@ -285,6 +285,15 @@ export class {{classname}} {
         // see https://stackoverflow.com/questions/4007969/application-x-www-form-urlencoded-or-multipart-form-data
         useForm = canConsumeForm;
 {{/isBinary}}
+{{^isBinary}}
+{{#items}}
+{{#isBinary}}
+        // use FormData to transmit files using content-type "multipart/form-data"
+        // see https://stackoverflow.com/questions/4007969/application-x-www-form-urlencoded-or-multipart-form-data
+        useForm = canConsumeForm;
+{{/isBinary}}
+{{/items}}
+{{/isBinary}}
 {{/formParams}}
         if (useForm) {
             formParams = new FormData();