diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b0d972160..4921fe996b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -131,7 +131,7 @@ else()
 	add_definitions(-D_ARCH_32=1)
 endif()
 
-if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^x86")
+if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^x86" OR ${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
 	add_definitions(-msse2)
 	set(_M_X86 1)
 	add_definitions(-D_M_X86=1)