1 files changed, 3 insertions, 0 deletions
diff --git a/gui/treemodel.h b/gui/treemodel.h
index 15370658..1d25dde4 100644
--- a/gui/treemodel.h
+++ b/gui/treemodel.h
@@ -355,6 +355,9 @@ class ElementXYRoot : public Item
 
 class Model : public QAbstractItemModel
 {
+  private:
+    Context *ctx_ = nullptr;
+
   public:
     using BelXYRoot = ElementXYRoot<BelId>;
     using WireXYRoot = ElementXYRoot<WireId>;