diff --git a/CMakeLists.txt b/CMakeLists.txt
index c764f3d..e28bd48 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,4 +10,5 @@ set (LIBRARY_OUTPUT_PATH ${EXECUTABLE_OUTPUT_PATH})
 
 add_subdirectory(src/c/a3)
 
-add_executable(a5 src/c/a5/flagtest.c)
\ No newline at end of file
+
+add_custom_target(a5 COMMAND make WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/src/c/a5)
\ No newline at end of file