diff --git a/src/plugins/cpptools/cppeditoroutline.cpp b/src/plugins/cpptools/cppeditoroutline.cpp
index 627385f107e..34ff1a504be 100644
--- a/src/plugins/cpptools/cppeditoroutline.cpp
+++ b/src/plugins/cpptools/cppeditoroutline.cpp
@@ -104,7 +104,6 @@ CppEditorOutline::CppEditorOutline(TextEditor::TextEditorWidget *editorWidget)
     else
         m_proxyModel->sort(-1, Qt::AscendingOrder); // don't sort yet, but set column for sortedOutline()
     m_proxyModel->setDynamicSortFilter(true);
-    m_proxyModel->setSortCaseSensitivity(Qt::CaseInsensitive);
 
     // Set up combo box
     m_combo->setModel(m_proxyModel);