diff --git a/src/supertux/game_object_manager.cpp b/src/supertux/game_object_manager.cpp
index ccb7d310067..61a7c289f4b 100644
--- a/src/supertux/game_object_manager.cpp
+++ b/src/supertux/game_object_manager.cpp
@@ -28,6 +28,7 @@ bool GameObjectManager::s_draw_solids_only = false;
 bool GameObjectManager::s_needs_flushing_gameobjects_added = false;
 bool GameObjectManager::s_needs_flushing_gameobjects_removed = false;
 bool GameObjectManager::s_needs_flushing_tilemaps = false;
+bool GameObjectManager::s_is_loading = false;
 
 GameObjectManager::GameObjectManager(bool undo_tracking) :
   m_initialized(false),
@@ -186,6 +187,9 @@ GameObjectManager::draw(DrawingContext& context)
 void
 GameObjectManager::flush_game_objects()
 {
+  if(s_is_loading)
+    return;
+
   if(!s_needs_flushing_gameobjects_added &&
      !s_needs_flushing_gameobjects_removed &&
      !s_needs_flushing_tilemaps)
diff --git a/src/supertux/game_object_manager.hpp b/src/supertux/game_object_manager.hpp
index c3e3c872fb9..4f8cd308d97 100644
--- a/src/supertux/game_object_manager.hpp
+++ b/src/supertux/game_object_manager.hpp
@@ -40,6 +40,7 @@ class GameObjectManager
   static bool s_needs_flushing_gameobjects_added;
   static bool s_needs_flushing_gameobjects_removed;
   static bool s_needs_flushing_tilemaps;
+  static bool s_is_loading;
 
 private:
   struct NameResolveRequest
diff --git a/src/supertux/sector_parser.cpp b/src/supertux/sector_parser.cpp
index 17c1aba89f9..fa6a06bbbaf 100644
--- a/src/supertux/sector_parser.cpp
+++ b/src/supertux/sector_parser.cpp
@@ -101,6 +101,7 @@ SectorParser::parse_object(const std::string& name_, const ReaderMapping& reader
 void
 SectorParser::parse(const ReaderMapping& sector)
 {
+  GameObjectManager::s_is_loading = true;
   auto iter = sector.get_iter();
   while (iter.next()) {
     if (iter.get_key() == "name") {
@@ -148,13 +149,14 @@ SectorParser::parse(const ReaderMapping& sector)
       }
     }
   }
-
+  GameObjectManager::s_is_loading = false;
   m_sector.finish_construction(m_editable);
 }
 
 void
 SectorParser::parse_old_format(const ReaderMapping& reader)
 {
+  GameObjectManager::s_is_loading = true;
   m_sector.set_name("main");
 
   float gravity;
@@ -300,6 +302,7 @@ SectorParser::parse_old_format(const ReaderMapping& reader)
   // add a camera
   auto camera_ = std::make_unique<Camera>("Camera");
   m_sector.add_object(std::move(camera_));
+  GameObjectManager::s_is_loading = false;
 
   m_sector.flush_game_objects();