diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index a3b38988..668f99ed 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -53,7 +53,6 @@ if (UNIX)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O2 -pipe")
 	
 	if (APPLE)
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -arch x86_64 -arch i386")
 		if (DARWIN_VERSION GREATER 10)
 			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-tautological-compare")
 		endif()