diff --git a/setup.py b/setup.py
index b0f71aa20..a387c605c 100755
--- a/setup.py
+++ b/setup.py
@@ -46,9 +46,8 @@ MOD_NAMES = [
 
 COMPILE_OPTIONS =  {
     'msvc': ['/Ox', '/EHsc'],
-    'mingw32' : ['-O3', '-Wno-strict-prototypes', '-Wno-unused-function'],
-    'other' : ['-O3', '-Wno-strict-prototypes', '-Wno-unused-function',
-               '-march=native']
+    'mingw32' : ['-O2', '-Wno-strict-prototypes', '-Wno-unused-function'],
+    'other' : ['-O2', '-Wno-strict-prototypes', '-Wno-unused-function']
 }