diff --git a/src/corelib/tools/qarraydata.cpp b/src/corelib/tools/qarraydata.cpp
index ef15fae83a..d9519745b0 100644
--- a/src/corelib/tools/qarraydata.cpp
+++ b/src/corelib/tools/qarraydata.cpp
@@ -103,7 +103,11 @@ QArrayData *QArrayData::allocate(size_t objectSize, size_t alignment,
         quintptr data = (quintptr(header) + sizeof(QArrayData) + alignment - 1)
                 & ~(alignment - 1);
 
+#if QT_SUPPORTS(UNSHARABLE_CONTAINERS)
         header->ref.atomic.store(bool(!(options & Unsharable)));
+#else
+        header->ref.atomic.store(1);
+#endif
         header->size = 0;
         header->alloc = capacity;
         header->capacityReserved = bool(options & CapacityReserved);
diff --git a/src/corelib/tools/qarraydata.h b/src/corelib/tools/qarraydata.h
index 95c1d5f22e..865bd4325d 100644
--- a/src/corelib/tools/qarraydata.h
+++ b/src/corelib/tools/qarraydata.h
@@ -249,11 +249,13 @@ struct QTypedArrayData
         return allocate(/* capacity */ 0);
     }
 
+#if QT_SUPPORTS(UNSHARABLE_CONTAINERS)
     static QTypedArrayData *unsharableEmpty()
     {
         Q_STATIC_ASSERT(sizeof(QTypedArrayData) == sizeof(QArrayData));
         return allocate(/* capacity */ 0, Unsharable);
     }
+#endif
 };
 
 template <class T, size_t N>