diff -r 1fc32bf069ff Modules/_ctypes/libffi/src/x86/ffi.c
--- a/Modules/_ctypes/libffi/src/x86/ffi.c	Wed Mar 18 14:39:33 2015 +0100
+++ b/Modules/_ctypes/libffi/src/x86/ffi.c	Thu Mar 19 08:39:52 2015 +0000
@@ -332,9 +332,11 @@
 ffi_call_win64(void (*)(char *, extended_cif *), extended_cif *,
                unsigned, unsigned, unsigned *, void (*fn)(void));
 #else
+#ifdef X86_WIN32
 extern void
 ffi_call_win32(void (*)(char *, extended_cif *), extended_cif *,
                unsigned, unsigned, unsigned, unsigned *, void (*fn)(void));
+#endif
 extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *,
                           unsigned, unsigned, unsigned *, void (*fn)(void));
 #endif
@@ -386,6 +388,7 @@
     case FFI_SYSV:
     case FFI_MS_CDECL:
 #endif
+#ifdef X86_WIN32
     case FFI_STDCALL:
       ffi_call_win32(ffi_prep_args, &ecif, cif->abi, cif->bytes, cif->flags,
 		     ecif.rvalue, fn);
@@ -420,6 +423,7 @@
       }
       break;
 #endif
+#endif
     default:
       FFI_ASSERT(0);
       break;
@@ -674,6 +678,7 @@
                            &ffi_closure_SYSV,
                            (void*)codeloc);
     }
+#ifdef X86_WIN32
   else if (cif->abi == FFI_FASTCALL)
     {
       FFI_INIT_TRAMPOLINE_STDCALL (&closure->tramp[0],
@@ -692,7 +697,6 @@
                                    &ffi_closure_STDCALL,
                                    (void*)codeloc);
     }
-#ifdef X86_WIN32
   else if (cif->abi == FFI_MS_CDECL)
     {
       FFI_INIT_TRAMPOLINE (&closure->tramp[0],
@@ -809,6 +813,7 @@
     case FFI_MS_CDECL:
 #endif
 #ifndef X86_WIN64
+#ifdef X86_WIN32
     case FFI_STDCALL:
       ffi_call_win32(ffi_prep_args_raw, &ecif, cif->abi, cif->bytes, cif->flags,
 		     ecif.rvalue, fn);
@@ -843,6 +848,7 @@
       }
       break;
 #endif
+#endif
     default:
       FFI_ASSERT(0);
       break;