diff --git a/lib/Exchange/JSONExporter.cpp b/lib/Exchange/JSONExporter.cpp
index 7e77280..423768b 100644
--- a/lib/Exchange/JSONExporter.cpp
+++ b/lib/Exchange/JSONExporter.cpp
@@ -173,7 +173,7 @@
   }
 
   root["statements"] = std::move(Statements);
-  return root;
+  return json::Value(std::move(root));
 }
 
 static void exportScop(Scop &S) {