diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index b4ff91b..d89bb3d 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -568,13 +568,13 @@ void Human::_UpdateMove(int speed)
     }
     {
         for (auto& node : body_list) {
-            pre_node_pos = node->pos;
-
             a8::Vec2 new_pos = (pre_node_pos + node->pos) / 2;
             a8::Vec2 dist_vec = pre_node->pos - new_pos;
-            node->pos = new_pos;
             float move_dist = dist_vec.Norm() - node_dist;
 
+            pre_node_pos = node->pos;
+            node->pos = new_pos;
+
             pre_node = node;
         }
     }