diff --git a/libraries/chain/market_evaluator.cpp b/libraries/chain/market_evaluator.cpp
index 7d8c94a5..a1314ec7 100644
--- a/libraries/chain/market_evaluator.cpp
+++ b/libraries/chain/market_evaluator.cpp
@@ -21,6 +21,7 @@
 #include <graphene/chain/market_evaluator.hpp>
 #include <graphene/chain/account_object.hpp>
 #include <graphene/chain/exceptions.hpp>
+#include <graphene/chain/hardfork.hpp>
 #include <fc/uint128.hpp>
 
 namespace graphene { namespace chain {