diff --git a/libraries/chain/CMakeLists.txt b/libraries/chain/CMakeLists.txt
index a8969c41..5688eabf 100644
--- a/libraries/chain/CMakeLists.txt
+++ b/libraries/chain/CMakeLists.txt
@@ -114,6 +114,7 @@ add_library( graphene_chain
              affiliate_payout.cpp
 
              son_evaluator.cpp
+             son_object.cpp
 
              ${HEADERS}
              ${PROTOCOL_HEADERS}
diff --git a/libraries/chain/include/graphene/chain/son_object.hpp b/libraries/chain/include/graphene/chain/son_object.hpp
index 56d0b2a6..5d92d8a7 100644
--- a/libraries/chain/include/graphene/chain/son_object.hpp
+++ b/libraries/chain/include/graphene/chain/son_object.hpp
@@ -45,9 +45,7 @@ namespace graphene { namespace chain {
          vesting_balance_id_type pay_vb;
          son_statistics_id_type statistics;
 
-         void pay_son_fee(share_type pay, database& db) {
-            db.adjust_balance( son_account, pay );
-         }
+         void pay_son_fee(share_type pay, database& db);
    };
 
    struct by_account;
diff --git a/libraries/chain/son_object.cpp b/libraries/chain/son_object.cpp
new file mode 100644
index 00000000..2d3c48ae
--- /dev/null
+++ b/libraries/chain/son_object.cpp
@@ -0,0 +1,8 @@
+#include <graphene/chain/database.hpp>
+#include <graphene/chain/son_object.hpp>
+
+namespace graphene { namespace chain {
+   void son_object::pay_son_fee(share_type pay, database& db) {
+      db.adjust_balance(son_account, pay);
+   }
+}}