diff --git a/Src/GBX.NET/Engines/Game/CGameCtnBlockInfo.chunkl b/Src/GBX.NET/Engines/Game/CGameCtnBlockInfo.chunkl
index 6c4933c7c..fb358a873 100644
--- a/Src/GBX.NET/Engines/Game/CGameCtnBlockInfo.chunkl
+++ b/Src/GBX.NET/Engines/Game/CGameCtnBlockInfo.chunkl
@@ -14,8 +14,8 @@ CGameCtnBlockInfo 0x0304E000
  CSceneMobil // VariantBaseAir
 
 0x00C [TM10, TMSX, TMF]
- iso4 SpawnLocAir
- iso4 SpawnLocGround
+ iso4? SpawnLocAir
+ iso4? SpawnLocGround
 
 0x00D [TMSX, TMF]
  bool // something with replacing?