diff --git a/src/context-measure.h b/src/context-measure.h
index 665c547..7e94f2c 100644
--- a/src/context-measure.h
+++ b/src/context-measure.h
@@ -29,7 +29,7 @@
 
   Context* context_;
 
-  BackReferenceMap back_reference_map_;
+  SerializerReferenceMap reference_map_;
   RootIndexMap root_index_map_;
 
   static const int kMaxRecursion = 16;