diff -r 9009178e08d9 Modules/_ctypes/libffi/src/x86/ffi.c
--- a/Modules/_ctypes/libffi/src/x86/ffi.c	Mon Jan 07 14:19:12 2013 +0000
+++ b/Modules/_ctypes/libffi/src/x86/ffi.c	Thu Mar 14 14:11:19 2013 -0700
@@ -315,9 +315,7 @@
   cif->bytes += 4 * sizeof(ffi_arg);
 #endif
 
-#ifdef X86_DARWIN
   cif->bytes = (cif->bytes + 15) & ~0xF;
-#endif
 
   return FFI_OK;
 }