diff --git a/modules/swagger-codegen/src/main/resources/JavaSpring/api.mustache b/modules/swagger-codegen/src/main/resources/JavaSpring/api.mustache
index bcdd35ecf1d..98673d46aa8 100644
--- a/modules/swagger-codegen/src/main/resources/JavaSpring/api.mustache
+++ b/modules/swagger-codegen/src/main/resources/JavaSpring/api.mustache
@@ -56,7 +56,7 @@ public interface {{classname}} {
         method = RequestMethod.{{httpMethod}})
     {{#jdk8}}default {{/jdk8}}{{#responseWrapper}}{{.}}<{{/responseWrapper}}ResponseEntity<{{>returnTypes}}>{{#responseWrapper}}>{{/responseWrapper}} {{operationId}}({{#allParams}}{{>queryParams}}{{>pathParams}}{{>headerParams}}{{>bodyParams}}{{>formParams}}{{#hasMore}},{{/hasMore}}{{/allParams}}){{^jdk8}};{{/jdk8}}{{#jdk8}} {
         // do some magic!
-        return {{#async}}CompletableFuture.completedFuture({{/async}}new ResponseEntity<{{>returnTypes}}>(HttpStatus.OK){{#async}}){{/async}};
+        return {{#async}}CompletableFuture.completedFuture({{/async}}new ResponseEntity<{{>returnTypes}}>(HttpStatus.NOT_IMPLEMENTED){{#async}}){{/async}};
     }{{/jdk8}}
 
 {{/operation}}