Asterisk spandsp patch

I’m installing Asterisk 1.4.13 with spandsp 0.0.3.
I succesfully compiled and installed spandsp and now I’m trying to patch Asterisk with the “asterisk.patch” file downloaded from

When I patch the Asterisk sources I get these messages:

server:/usr/local/src/asterisk-1.4.13# patch -p0 < asterisk.patch
patching file build_tools/
Hunk #1 succeeded at 20 with fuzz 1 (offset 3 lines).
patching file
Hunk #1 FAILED at 174.
Hunk #2 succeeded at 941 (offset 146 lines).
1 out of 2 hunks FAILED – saving rejects to file
patching file
Hunk #1 succeeded at 138 (offset 18 lines).

After this, in the “make menuselect” menu I see “xxxx” at the app_rxfax and app_txfax lines.

Where is the problem? Could you help me please?

Thank you very much!