diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4b62ef95c..febd61170 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,12 +70,8 @@ set(CMAKE_CXX_STANDARD 11)
 if(NOT CMAKE_BUILD_TYPE)
 	set(CMAKE_BUILD_TYPE "Release")
 endif()
-
-set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG")
-
-set(CMAKE_CXX_FLAGS_DEBUG "-DDEBUG")
-if(NOT WIN32)
-	list(APPEND CMAKE_CXX_FLAGS_DEBUG "-g")
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+	add_definitions("-DDEBUG")
 endif()
 
 if(ENABLE_STATIC)