diff --git a/src/plugins/qmldesigner/components/curveeditor/detail/treeview.cpp b/src/plugins/qmldesigner/components/curveeditor/detail/treeview.cpp
index c8b99d61c8d..82d8e2dd99d 100644
--- a/src/plugins/qmldesigner/components/curveeditor/detail/treeview.cpp
+++ b/src/plugins/qmldesigner/components/curveeditor/detail/treeview.cpp
@@ -37,6 +37,8 @@ TreeView::TreeView(CurveEditorModel *model, QWidget *parent)
 
     setStyle(model->style());
 
+    header()->setMinimumSectionSize(20);
+
     header()->setSectionResizeMode(0, QHeaderView::Stretch);
     header()->setSectionResizeMode(1, QHeaderView::Fixed);
     header()->setSectionResizeMode(2, QHeaderView::Fixed);