diff --git a/src/saveload/labelmaps_sl.cpp b/src/saveload/labelmaps_sl.cpp
--- a/src/saveload/labelmaps_sl.cpp
+++ b/src/saveload/labelmaps_sl.cpp
@@ -121,7 +121,9 @@ static void Load_RAIL()
 	}
 }
 
-extern const ChunkHandler _labelmaps_chunk_handlers[] = {
-	{ 'RAIL', Save_RAIL, Load_RAIL, nullptr, nullptr, CH_ARRAY | CH_LAST},
+static const ChunkHandler labelmaps_chunk_handlers[] = {
+	{ 'RAIL', Save_RAIL, Load_RAIL, nullptr, nullptr, CH_ARRAY },
 };
 
+extern const ChunkHandlerTable _labelmaps_chunk_handlers(labelmaps_chunk_handlers);
+