diff --git a/Neos.Neos/Classes/Service/NodeTypeSchemaBuilder.php b/Neos.Neos/Classes/Service/NodeTypeSchemaBuilder.php
index 43c51b5495d..46a76f65d14 100644
--- a/Neos.Neos/Classes/Service/NodeTypeSchemaBuilder.php
+++ b/Neos.Neos/Classes/Service/NodeTypeSchemaBuilder.php
@@ -75,15 +75,16 @@ public function generateNodeTypeSchema()
         }
 
         foreach ($nodeTypes as $nodeTypeName => $nodeType) {
+            // Skip abstract nodetypes which might have been added by the Neos.UI `nodeTypeRoles` configuration
             if ($nodeType->isAbstract() === false) {
                 $configuration = $nodeType->getFullConfiguration();
                 $schema['nodeTypes'][$nodeTypeName] = $configuration;
                 $schema['nodeTypes'][$nodeTypeName]['label'] = $nodeType->getLabel();
-
-                // Remove the postprocessors, as they are not needed in the UI
-                unset($schema['nodeTypes'][$nodeTypeName]['postprocessors']);
             }
 
+            // Remove the postprocessors, as they are not needed in the UI
+            unset($schema['nodeTypes'][$nodeTypeName]['postprocessors']);
+
             $subTypes = [];
             foreach ($this->nodeTypeManager->getSubNodeTypes($nodeType->getName(), false) as $subNodeType) {
                 $subTypes[] = $subNodeType->getName();