diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index aa0af1b0..9306abe4 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -3428,3 +3428,8 @@ void Human::CalcAssists(Human* target)
              });
     }
 }
+
+void Human::SyncVolume(int slot_id)
+{
+
+}
diff --git a/server/gameserver/human.h b/server/gameserver/human.h
index ced55303..cf2b1aa6 100644
--- a/server/gameserver/human.h
+++ b/server/gameserver/human.h
@@ -332,6 +332,7 @@ class Human : public Creature
     void RecalcVolume();
     void RecalcBaseAttr();
     int GetVolume(int slot_id);
+    void SyncVolume(int slot_id);
     void RecoverHp(int inc_hp);
     void AddObserver(Human* observer);
     void RemoveObserver(Human* observer);