diff --git a/CMakeLists.txt b/CMakeLists.txt
index 092e030..dd2758a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,7 @@ enable_cxx_compiler_flag_if_supported("-Wshadow")
 enable_cxx_compiler_flag_if_supported("-Wpedantic")
 enable_cxx_compiler_flag_if_supported("-pedantic")
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+  enable_cxx_compiler_flag_if_supported("-O0")
   enable_cxx_compiler_flag_if_supported("-g")
   enable_cxx_compiler_flag_if_supported("-pg")
   enable_cxx_compiler_flag_if_supported("-finstrument-functions")