diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c88066..855fec2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,6 @@
 cmake_minimum_required(VERSION 2.8.10 FATAL_ERROR)
 
-
-string(REPLACE "-O2" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
-string(REPLACE "-O2" "" CMAKE_C_FLAGS ${CMAKE_CXX_FLAGS})
+SET(CMAKE_CXX_FLAGS_DEBUG "-O0")
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})