1 files changed, 1 insertions, 1 deletions
diff --git a/flowgraph/graph.h b/flowgraph/graph.h
index 15c6aef..c0ab847 100644
--- a/flowgraph/graph.h
+++ b/flowgraph/graph.h
@@ -20,7 +20,7 @@ namespace FlowGraph {
   Graph& operator= (const Graph&) = default;
 
   // returns the outermost scope inside this graph
-  LocalScope& scope() const;
+  std::shared_ptr<LocalScope> scope() const;
 
   // append other graph by joining the respective outermost scopes
   void append(const Graph& other);