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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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