diff --git a/libraries/chain/include/graphene/chain/evaluator.hpp b/libraries/chain/include/graphene/chain/evaluator.hpp
index aebbe260..e42c312b 100644
--- a/libraries/chain/include/graphene/chain/evaluator.hpp
+++ b/libraries/chain/include/graphene/chain/evaluator.hpp
@@ -22,7 +22,7 @@
 namespace graphene { namespace chain {
 
    class database;
-   class signed_transaction;
+   struct signed_transaction;
    class generic_evaluator;
    class transaction_evaluation_state;
 
diff --git a/libraries/fc b/libraries/fc
index f461dee4..7bd47af8 160000
--- a/libraries/fc
+++ b/libraries/fc
@@ -1 +1 @@
-Subproject commit f461dee4325b73dc05687e5a8a2471bd057fab82
+Subproject commit 7bd47af88eaba93711da58cf7ddfe866deb21948