diff --git a/src/corelib/tools/qsharedpointer_impl.h b/src/corelib/tools/qsharedpointer_impl.h
index b1434b530e6..1323dd6b1c3 100644
--- a/src/corelib/tools/qsharedpointer_impl.h
+++ b/src/corelib/tools/qsharedpointer_impl.h
@@ -362,8 +362,8 @@ public:
     template <class X>
     inline QSharedPointer &operator=(const QSharedPointer<X> &other)
     {
-        QSHAREDPOINTER_VERIFY_AUTO_CAST(T, X); // if you get an error in this line, the cast is invalid
-        internalCopy(other);
+        QSharedPointer copy(other);
+        swap(copy);
         return *this;
     }
 
@@ -527,18 +527,6 @@ private:
         enableSharedFromThis(ptr);
     }
 
-    template <class X>
-    inline void internalCopy(const QSharedPointer<X> &other)
-    {
-        Data *o = other.d;
-        T *actual = other.value;
-        if (o)
-            other.ref();
-        qSwap(d, o);
-        qSwap(this->value, actual);
-        deref(o);
-    }
-
     void internalSwap(QSharedPointer &other) Q_DECL_NOTHROW
     {
         qSwap(d, other.d);