diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba579d8..935c9af 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,8 +26,12 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 	
 include(CheckCXXCompilerFlag)
 CHECK_CXX_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
-if(NOT(${CMAKE_BUILD_TYPE} STREQUAL "RelWithDebInfo") AND COMPILER_SUPPORTS_MARCH_NATIVE)
+if(COMPILER_SUPPORTS_MARCH_NATIVE)
+if("${CMAKE_BUILD_TYPE}" STREQUAL "") 
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native")
+elseif(NOT(${CMAKE_BUILD_TYPE} STREQUAL "RelWithDebInfo"))
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native")
+endif()
 endif()
 
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
@@ -55,4 +59,4 @@ GET_DIRECTORY_PROPERTY(SOFTFLOAT_INCLUDE_DIRS DIRECTORY softfloat DEFINITION SOF
 add_subdirectory(riscv)
 add_subdirectory(riscv.sc)
 
-message(STATUS "Build Type: ${CMAKE_BUILD_TYPE}")
\ No newline at end of file
+message(STATUS "Build Type: ${CMAKE_BUILD_TYPE}")