diff --git a/setup.py b/setup.py
index bf63e71c537e758a546c945cacaf1c069f3a8cf7..fa50aeed7409812c2d8751ece2f1ccb404eba7db 100644
--- a/setup.py
+++ b/setup.py
@@ -55,9 +55,7 @@ def get_config_schema():
 
         default_libs = []
         default_cxxflags = default_cxxflags + [
-                "-stdlib=libc++", "-mmacosx-version-min=10.7",
-                "-arch', 'i386", "-arch", "x86_64", "-arch", "arm64",
-                ]
+                "-stdlib=libc++", "-mmacosx-version-min=10.7"]
 
         from os.path import isdir
         for srp in sysroot_paths: