diff --git a/src/corelib/tools/qarraydata.h b/src/corelib/tools/qarraydata.h
index 90503786e4..dd2b777ed7 100644
--- a/src/corelib/tools/qarraydata.h
+++ b/src/corelib/tools/qarraydata.h
@@ -101,10 +101,6 @@ struct Q_CORE_EXPORT QArrayData
     AllocationOptions detachFlags() const
     {
         AllocationOptions result;
-#if QT_SUPPORTS(UNSHARABLE_CONTAINERS)
-        if (!ref.isSharable())
-            result |= Unsharable;
-#endif
         if (capacityReserved)
             result |= CapacityReserved;
         return result;