diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6dae22c..4e6f7f8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,8 +10,8 @@ set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_FLAGS "-Wall -pedantic -Wextra -Werror=return-type")
 
-include(libfixmath/libfixmath.cmake)
-include(tests/tests.cmake)
+add_subdirectory(libfixmath)
+#include(tests/tests.cmake)
 
 file(GLOB fixsingen-srcs fixsingen/*.c)
 file(GLOB fixtest-srcs fixtest/*.c fixtest/*.h)
diff --git a/libfixmath/libfixmath.cmake b/libfixmath/CMakeLists.txt
similarity index 100%
rename from libfixmath/libfixmath.cmake
rename to libfixmath/CMakeLists.txt