diff --git a/phpparsejob.cpp b/phpparsejob.cpp
--- a/phpparsejob.cpp
+++ b/phpparsejob.cpp
@@ -75,10 +75,9 @@
         static std::once_flag once;
         std::call_once(once, [phpSupport] {
             qCDebug(PHP) << "Initializing internal function file" << internalFunctionFile();
-            ParseJob internalJob(internalFunctionFile(), phpSupport);
-            internalJob.setMinimumFeatures(TopDUContext::AllDeclarationsAndContexts);
-            internalJob.run({}, nullptr);
-            Q_ASSERT(internalJob.success());
+            auto minimumFeatures = TopDUContext::AllDeclarationsAndContexts;
+            KDevelop::ICore::self()->languageController()->backgroundParser()->addDocument(
+                internalFunctionFile(), minimumFeatures, 100);
         });
     }