diff --git a/src/plugins/cppeditor/cppparsecontext.cpp b/src/plugins/cppeditor/cppparsecontext.cpp
index 7c98fbba8f7..cf77ffe8088 100644
--- a/src/plugins/cppeditor/cppparsecontext.cpp
+++ b/src/plugins/cppeditor/cppparsecontext.cpp
@@ -118,7 +118,7 @@ int ParseContextModel::rowCount(const QModelIndex &) const
 
 QVariant ParseContextModel::data(const QModelIndex &index, int role) const
 {
-    if (m_projectParts.isEmpty())
+    if (!index.isValid() || index.row() < 0 || index.row() >= m_projectParts.size())
         return QVariant();
 
     const int row = index.row();