diff --git a/server/gameserver/mt/Buff.cc b/server/gameserver/mt/Buff.cc
index 6b6f58b4..1b50fb27 100644
--- a/server/gameserver/mt/Buff.cc
+++ b/server/gameserver/mt/Buff.cc
@@ -417,6 +417,18 @@ namespace mt
     }
 
     float Buff::GetBuffParam6(::Buff* buff) const
+    {
+        if (_buff_param6_expr) {
+            return LispEnv::Instance()->EvalSkillNumberExpr
+                (
+                 _buff_param6_expr,
+                 buff
+                 );
+        }
+        return _buff_param6;
+    }
+
+    float Buff::GetResScale(::Buff* buff) const
     {
         if (_res_scale_expr) {
             return LispEnv::Instance()->EvalSkillNumberExpr
@@ -428,10 +440,6 @@ namespace mt
         return _res_scale;
     }
 
-    float Buff::GetResScale(::Buff* buff) const
-    {
-    }
-
     std::string Buff::duration_time() const
     {
         return mtb::Buff::duration_time();