diff --git a/src/openrct2/object/ObjectManager.cpp b/src/openrct2/object/ObjectManager.cpp
index b3ae3b23d5..6e328e51f0 100644
--- a/src/openrct2/object/ObjectManager.cpp
+++ b/src/openrct2/object/ObjectManager.cpp
@@ -202,7 +202,7 @@ public:
         for (size_t i = 0; i < numObjects; i++)
         {
             const ObjectRepositoryItem* item = &_objectRepository.GetObjects()[i];
-            if (item->LoadedObject != nullptr && item->LoadedObject->GetLegacyData() != nullptr && IsObjectCustom(item))
+            if (item->LoadedObject != nullptr && IsObjectCustom(item) && item->LoadedObject->GetLegacyData() != nullptr)
             {
                 objects.push_back(item);
             }
diff --git a/src/openrct2/object/ObjectRepository.cpp b/src/openrct2/object/ObjectRepository.cpp
index 57c8425242..38b2eab13e 100644
--- a/src/openrct2/object/ObjectRepository.cpp
+++ b/src/openrct2/object/ObjectRepository.cpp
@@ -627,6 +627,14 @@ bool IsObjectCustom(const ObjectRepositoryItem* object)
 {
     Guard::ArgumentNotNull(object);
 
+    // Do not count our new object types as custom yet, otherwise the game
+    // will try to pack them into saved games.
+    auto type = object_entry_get_type(&object->ObjectEntry);
+    if (type > OBJECT_TYPE_SCENARIO_TEXT)
+    {
+        return false;
+    }
+
     // Validate the object is not one from base game or expansion pack
     return !(object->ObjectEntry.flags & 0xF0);
 }