diff --git a/src/corelib/tools/qlinkedlist.h b/src/corelib/tools/qlinkedlist.h
index 99be770ae9b..572bdfba5d8 100644
--- a/src/corelib/tools/qlinkedlist.h
+++ b/src/corelib/tools/qlinkedlist.h
@@ -453,6 +453,9 @@ int QLinkedList<T>::count(const T &t) const
 template <typename T>
 typename QLinkedList<T>::iterator QLinkedList<T>::insert(iterator before, const T &t)
 {
+    if (d->ref.isShared())
+        before = detach_helper2(before);
+
     Node *i = before.i;
     Node *m = new Node(t);
     m->n = i;
diff --git a/tests/auto/corelib/tools/qlinkedlist/tst_qlinkedlist.cpp b/tests/auto/corelib/tools/qlinkedlist/tst_qlinkedlist.cpp
index b1a9946a0f5..3fa78f5f13e 100644
--- a/tests/auto/corelib/tools/qlinkedlist/tst_qlinkedlist.cpp
+++ b/tests/auto/corelib/tools/qlinkedlist/tst_qlinkedlist.cpp
@@ -47,6 +47,7 @@ class tst_QLinkedList : public QObject
     Q_OBJECT
 private slots:
     void eraseValidIteratorsOnSharedList() const;
+    void insertWithIteratorsOnSharedList() const;
 };
 
 void tst_QLinkedList::eraseValidIteratorsOnSharedList() const
@@ -73,5 +74,23 @@ void tst_QLinkedList::eraseValidIteratorsOnSharedList() const
     QCOMPARE(*r, 10); // Ensure that number 2 instance was removed;
 }
 
+void tst_QLinkedList::insertWithIteratorsOnSharedList() const
+{
+    QLinkedList<int> a, b;
+    a.append(5);
+    a.append(10);
+    a.append(20);
+    QLinkedList<int>::iterator i = a.begin();
+    ++i;
+    ++i;
+    b = a;
+
+    QLinkedList<int>::iterator i2 = a.insert(i, 15);
+    QCOMPARE(b.size(), 3);
+    QCOMPARE(a.size(), 4);
+    --i2;
+    QCOMPARE(*i2, 10);
+}
+
 QTEST_MAIN(tst_QLinkedList)
 #include "tst_qlinkedlist.moc"