diff --git a/src/corelib/tools/qcontiguouscache.h b/src/corelib/tools/qcontiguouscache.h
index 248a8e580e..469160bff2 100644
--- a/src/corelib/tools/qcontiguouscache.h
+++ b/src/corelib/tools/qcontiguouscache.h
@@ -387,10 +387,12 @@ void QContiguousCache<T>::insert(int pos, const T &value)
     Q_ASSERT_X(pos >= 0 && pos < INT_MAX, "QContiguousCache<T>::insert", "index out of range");
     detach();
     if (containsIndex(pos)) {
-        if(QTypeInfo<T>::isComplex)
+        if (QTypeInfo<T>::isComplex) {
+            (p->array + pos % d->alloc)->~T();
             new (p->array + pos % d->alloc) T(value);
-        else
+        } else {
             p->array[pos % d->alloc] = value;
+        }
     } else if (pos == d->offset-1)
         prepend(value);
     else if (pos == d->offset+d->count)