diff --git a/src/plugins/projectexplorer/projecttree.cpp b/src/plugins/projectexplorer/projecttree.cpp
index 1ec856c6514..376dc73d7f1 100644
--- a/src/plugins/projectexplorer/projecttree.cpp
+++ b/src/plugins/projectexplorer/projecttree.cpp
@@ -149,7 +149,7 @@ void ProjectTree::updateFromFocus(bool invalidCurrentNode)
 void ProjectTree::updateFromProjectTreeWidget(ProjectTreeWidget *widget)
 {
     Node *currentNode = widget->currentNode();
-    Project *project = projectForNode(currentNode);
+    Project *project = SessionManager::projectForNode(currentNode);
 
     update(currentNode, project);
 }
@@ -159,23 +159,6 @@ void ProjectTree::documentManagerCurrentFileChanged()
     updateFromFocus();
 }
 
-Project *ProjectTree::projectForNode(Node *node)
-{
-    if (!node)
-        return nullptr;
-
-    FolderNode *rootProjectNode = node->asFolderNode();
-    if (!rootProjectNode)
-        rootProjectNode = node->parentFolderNode();
-
-    while (rootProjectNode && rootProjectNode->parentFolderNode() != SessionManager::sessionNode())
-        rootProjectNode = rootProjectNode->parentFolderNode();
-
-    Q_ASSERT(rootProjectNode);
-
-    return Utils::findOrDefault(SessionManager::projects(), Utils::equal(&Project::rootProjectNode, rootProjectNode));
-}
-
 void ProjectTree::updateFromDocumentManager(bool invalidCurrentNode)
 {
     Core::IDocument *document = Core::EditorManager::currentDocument();
@@ -194,7 +177,7 @@ void ProjectTree::updateFromNode(Node *node)
 {
     Project *project;
     if (node)
-        project = projectForNode(node);
+        project = SessionManager::projectForNode(node);
     else
         project = SessionManager::startupProject();
 
diff --git a/src/plugins/projectexplorer/projecttree.h b/src/plugins/projectexplorer/projecttree.h
index cd1ec25ef85..196e280c142 100644
--- a/src/plugins/projectexplorer/projecttree.h
+++ b/src/plugins/projectexplorer/projecttree.h
@@ -55,7 +55,6 @@ public:
     static void registerWidget(Internal::ProjectTreeWidget *widget);
     static void unregisterWidget(Internal::ProjectTreeWidget *widget);
     static void nodeChanged(Internal::ProjectTreeWidget *widget);
-    static Project *projectForNode(Node *node);
 
     static void aboutToShutDown();