diff --git a/bsp/cmake-modules/br.cmake b/bsp/cmake-modules/br.cmake
index 0da7e8e7..6a064bdb 100644
--- a/bsp/cmake-modules/br.cmake
+++ b/bsp/cmake-modules/br.cmake
@@ -17,7 +17,7 @@ set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -DNDEBUG -Os")
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Wall -DNDEBUG -Os")
 
 # Debug
-set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g -O0")
+set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -DDEBUG -g -O0")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${CMAKE_C_FLAGS_DEBUG} -Wall")
 
 # Linker