diff --git a/src/widgets/kdirmodel.cpp b/src/widgets/kdirmodel.cpp
--- a/src/widgets/kdirmodel.cpp
+++ b/src/widgets/kdirmodel.cpp
@@ -247,6 +247,7 @@
 
 KDirModelNode *KDirModelPrivate::nodeForUrl(const QUrl &_url) const // O(1), well, O(length of url as a string)
 {
+
     QUrl url = cleanupUrl(_url);
     if (url == urlForNode(m_rootNode)) {
         return m_rootNode;
@@ -341,7 +342,7 @@
 // node -> index. If rowNumber is set (or node is root): O(1). Otherwise: O(n).
 QModelIndex KDirModelPrivate::indexForNode(KDirModelNode *node, int rowNumber) const
 {
-    if (node == m_rootNode) {
+    if (!node || node == m_rootNode) {
         return QModelIndex();
     }