diff --git a/CMakeLists.txt b/CMakeLists.txt
index 346f832..06d83d0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,8 @@ find_package(catkin REQUIRED COMPONENTS
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
+add_definitions(-Wall)
+add_definitions(-Wextra)
 
 if(COVERAGE)
   message(WARNING "building with --coverage, the performance might be limited")