diff --git a/server/gameserver/movehelper.cc b/server/gameserver/movehelper.cc
index 95b238b4..3d57a8e8 100644
--- a/server/gameserver/movehelper.cc
+++ b/server/gameserver/movehelper.cc
@@ -52,6 +52,10 @@ bool MoveHelper::GetMovePosition(glm::vec3& out_pos)
                 next_point.dir.z = dir.y;
             }
         }
+        if (owner_->GetPos().x < 0 ||
+            owner_->GetPos().y < 0) {
+            abort();
+        }
         return true;
     }
     return false;
@@ -84,7 +88,8 @@ void MoveHelper::CalcTargetPos(float distance)
     bool is_hit = false;
     MovePathPoint point;
     if (c->HasBuffEffect(kBET_ThroughWall) ||
-        c->HasBuffEffect(kBET_Fly)) {
+        c->HasBuffEffect(kBET_Fly) ||
+        c->HasBuffEffect(kBET_Jump)) {
         point.tar_pos = end * 10.f;
         if (point.tar_pos.x > owner_->room->GetMapMeta()->i->map_width() + 10) {
             point.tar_pos.x = owner_->room->GetMapMeta()->i->map_width() - 10;
@@ -95,8 +100,8 @@ void MoveHelper::CalcTargetPos(float distance)
         if (point.tar_pos.x < 10) {
             point.tar_pos.x = 10;
         }
-        if (point.tar_pos.y < 10) {
-            point.tar_pos.y = 10;
+        if (point.tar_pos.z < 10) {
+            point.tar_pos.z = 10;
         }
     } else {
         int ret = owner_->room->map_instance->Raycast(0, start, end, hit_point);
@@ -115,7 +120,11 @@ void MoveHelper::CalcTargetPos(float distance)
     point.src_pos.z = owner_->GetPos().y;
     point.frameno = owner_->room->GetFrameNo() - 1;
 
-#ifdef DEBUG
+    if (point.tar_pos.x < 0 ||
+        point.tar_pos.z < 0) {
+        abort();
+    }
+#ifdef DEBUG1
     a8::XPrintf("CalcTargetPos src_pos:%f,%f tar_pos:%f,%f is_hit:%d start:%f,%f,%f end:%f,%f,%f\n",
                 {
                     point.src_pos.x,