diff --git a/server/gameserver/player.cc b/server/gameserver/player.cc
index a1d9c35..ed6327f 100644
--- a/server/gameserver/player.cc
+++ b/server/gameserver/player.cc
@@ -1008,9 +1008,11 @@ void Player::_CMMove(f8::MsgHdr& hdr, const cs::CMMove& msg)
             a8::Vec2 old_move_dir;
             a8::Vec2 new_move_dir;
             TypeConvert::FromPb(new_move_dir, &msg.move_dir());
-            new_move_dir.Normalize();
-            SetMoveDir(new_move_dir);
-            moving = true;
+            if (!HasBuffEffect(kBET_Vertigo)) {
+                new_move_dir.Normalize();
+                SetMoveDir(new_move_dir);
+                moving = true;
+            }
         }
     }
     assert(!isnan(GetMoveDir().x) && !isnan(GetMoveDir().y));