diff --git a/Extractor/ApiDocExtractor.php b/Extractor/ApiDocExtractor.php
index 3535300..83bc59e 100644
--- a/Extractor/ApiDocExtractor.php
+++ b/Extractor/ApiDocExtractor.php
@@ -108,11 +108,11 @@ class ApiDocExtractor
             if ($method = $this->getReflectionMethod($route->getDefault('_controller'))) {
                 if ($annotation = $this->reader->getMethodAnnotation($method, self::ANNOTATION_CLASS)) {
                     if ($annotation->isResource()) {
-                        if (!($resource = $annotation->getResource())) {
+                        if ($resource = $annotation->getResource()) {
+                            $resources[] = $resource;
+                        } else {
                             // remove format from routes used for resource grouping
                             $resources[] = str_replace('.{_format}', '', $route->getPattern());
-                        } else {
-                            $resources[] = $resource;
                         }
                     }