diff --git a/CMakeLists.txt b/CMakeLists.txt
index af6c71b..0874920 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@ message("Detected build type: ${CMAKE_BUILD_TYPE}")
 if("${CMAKE_BUILD_TYPE}" MATCHES "Release")
     if("${CMAKE_C_COMPILER_ID}" MATCHES "MSVC")
         add_compile_options("/O2" "/fp:fast")
-        if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES "i686" OR ${CMAKE_SYSTEM_PROCESSOR} MATCHES "AMD64")
+        if(${CMAKE_C_COMPILER_ARCHITECTURE_ID} MATCHES "X86" OR ${CMAKE_C_COMPILER_ARCHITECTURE_ID} MATCHES "x64")
             add_compile_options("/arch:SSE2")
         endif()
     else()