diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 13893f0..17bbcac 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -1,4 +1,5 @@
 if(NOT CMAKE_CROSSCOMPILING)
   add_subdirectory(Catch2)
+else()
+  include(AddLufa.cmake)
 endif()
-include(AddLufa.cmake)