diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
index bdebfe5f116..ff102ffea6a 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
@@ -119,7 +119,7 @@ public:
                                                   RTDyldMemoryManager *mm);
 
   std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
-  loadObject(const object::ObjectFile &O);
+  loadObject(const object::ObjectFile &O) override;
 
   SectionEntry &getSection(unsigned SectionID) { return Sections[SectionID]; }