diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -232,6 +232,7 @@ add_files(
     league_gui.h
     league_gui.cpp
     league_type.h
+    library_loader.h
     livery.h
     main_gui.cpp
     map.cpp