diff --git a/libraries/chain/include/graphene/chain/sidechain_address_object.hpp b/libraries/chain/include/graphene/chain/sidechain_address_object.hpp
index b8aa07c6..73be44d5 100644
--- a/libraries/chain/include/graphene/chain/sidechain_address_object.hpp
+++ b/libraries/chain/include/graphene/chain/sidechain_address_object.hpp
@@ -31,7 +31,7 @@ namespace graphene { namespace chain {
          time_point_sec expires;
 
          sidechain_address_object() :
-            sidechain(sidechain_type::bitcoin),
+            sidechain(sidechain_type::bitcoin), //! FIXME - bitcoin ???
             deposit_public_key(""),
             deposit_address(""),
             withdraw_public_key(""),