diff --git a/source.list b/source.list
--- a/source.list
+++ b/source.list
@@ -469,6 +469,7 @@ saveload/engine_sl.cpp
 saveload/gamelog_sl.cpp
 saveload/group_sl.cpp
 saveload/industry_sl.cpp
+saveload/labelmaps_sl.cpp
 saveload/map_sl.cpp
 saveload/misc_sl.cpp
 saveload/newgrf_sl.cpp