diff --git a/libusb/descriptor.c b/libusb/descriptor.c
index 74d6de5..0b0e314 100644
--- a/libusb/descriptor.c
+++ b/libusb/descriptor.c
@@ -1174,7 +1174,7 @@ int API_EXPORTED libusb_get_string_descriptor_ascii(libusb_device_handle *dev_ha
 		return LIBUSB_ERROR_IO;
 
 	if (tbuf[0] > r)
-		return LIBUSB_ERROR_IO;
+		tbuf[0] = r;
 
 	di = 0;
 	for (si = 2; si < tbuf[0]; si += 2) {
-- 
2.17.0

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<div class='path'>path: <a href='/guix/log/?id=15ada26abb2424d05d50a3b2f7d50f8eaba263b7'>root</a>/<a href='/guix/log/.dir-locals.el?id=15ada26abb2424d05d50a3b2f7d50f8eaba263b7'>.dir-locals.el</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/.dir-locals.el?id=15ada26abb2424d05d50a3b2f7d50f8eaba263b7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-03-07 00:00:18 +0100'>2019-03-07</span></td><td><a href='/guix/commit/.dir-locals.el?id=a4678c6ba18d8dbd79d931f80426eebf61be7ebe'>database: Make 'register-items' transactional.</a><span class='msg-avail'>...</span></td><td>Caleb Ristvedt</td></tr>
<tr><td><span title='2019-01-11 12:14:38 +0100'>2019-01-11</span></td><td><a href='/guix/commit/.dir-locals.el?id=7804c45b9ce5a8edd06452d828249e588ae26263'>status: Add 'with-status-verbosity'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-19 18:28:57 +0200'>2018-10-19</span></td><td><a href='/guix/commit/.dir-locals.el?id=19c924af4f3726688ca155a905ebf1cb9acdfca2'>tests: Run 'guix pack' tests using the external store.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-09-27 23:21:53 +0200'>2018-09-27</span></td><td><a href='/guix/commit/.dir-locals.el?id=dc0f74e5fc26977a3ee6c4f2aa74a141f4359982'>Add (guix status) and use it for pretty colored output.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-01 15:35:32 +0200'>2018-06-01</span></td><td><a href='/guix/commit/.dir-locals.el?id=7f9d184d9b688d13ce76eefabaddcfa76bdde2b5'>Add (gnu store database).</a><span class='msg-avail'>...</span></td><td>Caleb Ristvedt</td></tr>
<tr><td><span title='2018-06-01 15:20:54 +0200'>2018-06-01</span></td><td><a href='/guix/commit/.dir-locals.el?id=838e17d8050236a6d3ffde991fb0035412eb3046'>gexp: Add 'with-extensions'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
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<tr><td><span title='2017-12-01 16:00:14 +0100'>2017-12-01</span></td><td><a href='/guix/commit/.dir-locals.el?id=1fafa2f58732a3fb75258be342c92a2772af2860'>weather: Use (guix progress) for progress report.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>