diff --git a/conf/config.stubFiles.neon b/conf/config.stubFiles.neon
index 4485fb6699..158fdc5a6f 100644
--- a/conf/config.stubFiles.neon
+++ b/conf/config.stubFiles.neon
@@ -11,3 +11,4 @@ parameters:
 		- ../stubs/zip.stub
 		- ../stubs/dom.stub
 		- ../stubs/spl.stub
+		- ../stubs/SplObjectStorage.stub