diff --git a/model/annotated-topology-reader.h b/model/annotated-topology-reader.h
index eccbc29..6edcb34 100644
--- a/model/annotated-topology-reader.h
+++ b/model/annotated-topology-reader.h
@@ -65,7 +65,7 @@
   /**
    * \brief Get links read by the reader
    */  
-  std::list<Link>
+  const std::list<Link>&
   GetLinks () const;
   
   /**