diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
index f8b8ac652e..5757b30bc5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
@@ -196,7 +196,7 @@ class JsonDescriptor extends Descriptor
             'synthetic' => $definition->isSynthetic(),
             'lazy' => $definition->isLazy(),
             'synchronized' => $definition->isSynchronized(),
-            'abstract' => $definition->isSynchronized(),
+            'abstract' => $definition->isAbstract(),
             'file' => $definition->getFile(),
         );