diff --git a/server/gameserver/mapinstance.cc b/server/gameserver/mapinstance.cc
index 09f7628f..f6207d6e 100644
--- a/server/gameserver/mapinstance.cc
+++ b/server/gameserver/mapinstance.cc
@@ -101,9 +101,15 @@ void MapInstance::Init()
     }
     map_service_ = std::make_shared<MapService>();
     grid_service_ = std::make_shared<GridService>();
-    grid_service_->Init(map_meta_->map_width(),
-                        map_meta_->map_height(),
-                        mt::Param::s().map_cell_width);
+    if (map_meta_->is_moba()) {
+        grid_service_->Init(map_meta_->map_width(),
+                            map_meta_->map_height(),
+                            std::max(map_meta_->map_width(), map_meta_->map_height()) + 0);
+    } else {
+        grid_service_->Init(map_meta_->map_width(),
+                            map_meta_->map_height(),
+                            mt::Param::s().map_cell_width);
+    }
     map_service_->Init(map_meta_->map_width() / MAP_GRID_WIDTH,
                        map_meta_->map_height() / MAP_GRID_WIDTH,
                        MAP_GRID_WIDTH);