diff --git a/src/piechart/qpieseries.cpp b/src/piechart/qpieseries.cpp
index 49701ba..9f7dd96 100644
--- a/src/piechart/qpieseries.cpp
+++ b/src/piechart/qpieseries.cpp
@@ -269,6 +269,8 @@ bool QPieSeries::append(QList<QPieSlice*> slices)
     foreach (QPieSlice* s, slices) {
         if (!s || d->m_slices.contains(s))
             return false;
+        if (s->series()) // already added to some series
+            return false;
     }
 
     foreach (QPieSlice* s, slices) {
@@ -329,6 +331,9 @@ bool QPieSeries::insert(int index, QPieSlice* slice)
     if (!slice || d->m_slices.contains(slice))
         return false;
 
+    if (slice->series()) // already added to some series
+        return false;
+
     slice->setParent(this);
     QPieSlicePrivate::fromSlice(slice)->m_series = this;
     d->m_slices.insert(index, slice);
diff --git a/tests/auto/qpieseries/tst_qpieseries.cpp b/tests/auto/qpieseries/tst_qpieseries.cpp
index d215ea9..8fa8f14 100644
--- a/tests/auto/qpieseries/tst_qpieseries.cpp
+++ b/tests/auto/qpieseries/tst_qpieseries.cpp
@@ -171,6 +171,10 @@ void tst_qpieseries::append()
     QCOMPARE(added.count(), 1);
     QCOMPARE(added.first(), slice1);
 
+    // try to append same slice to another series
+    QPieSeries series2;
+    QVERIFY(!series2.append(slice1));
+
     // append pointer list
     QList<QPieSlice *> list;
     QVERIFY(!m_series->append(list));
@@ -240,6 +244,10 @@ void tst_qpieseries::insert()
     QCOMPARE(added.count(), 1);
     QCOMPARE(added.first(), slice1);
 
+    // try to insert same slice to another series
+    QPieSeries series2;
+    QVERIFY(!series2.insert(0, slice1));
+
     // add some more slices
     QPieSlice *slice2 = m_series->append("slice 2", 2);
     QPieSlice *slice4 = m_series->append("slice 4", 4);