diff --git a/src/Symfony/Component/Workflow/Definition.php b/src/Symfony/Component/Workflow/Definition.php
index dd0c0626cf785..1ecbc0dfb56e0 100644
--- a/src/Symfony/Component/Workflow/Definition.php
+++ b/src/Symfony/Component/Workflow/Definition.php
@@ -94,7 +94,7 @@ public function getMetadataStore(): MetadataStoreInterface
 
     private function setInitialPlaces($places = null)
     {
-        if (null === $places) {
+        if (!$places) {
             return;
         }