diff --git a/Rakefile b/Rakefile
index 058d93c..67b32ec 100644
--- a/Rakefile
+++ b/Rakefile
@@ -20,10 +20,6 @@ namespace "ffi-compiler" do
     c.have_library?('png')
     c.have_library?('jpeg')
     c.have_library?('tiff')
-    if c.platform.mac?
-      c.cflags << "-arch x86_64"
-      c.ldflags << "-arch x86_64"
-    end
     c.ldflags << ENV['LD_FLAGS'] if ENV['LD_FLAGS']
     c.cflags << ENV['C_FLAGS'] if ENV['C_FLAGS']
   end