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-rw-r--r--networking/tftp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/networking/tftp.c b/networking/tftp.c
index 92966a2..10aa63b 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -294,7 +294,7 @@ static inline int tftp(const int cmd, const struct hostent *host,
#ifdef CONFIG_FEATURE_TFTP_DEBUG
fprintf(stderr, "sending %u bytes\n", len);
for (cp = buf; cp < &buf[len]; cp++)
- fprintf(stderr, "%02x ", *cp);
+ fprintf(stderr, "%02x ", (unsigned char)*cp);
fprintf(stderr, "\n");
#endif
if (sendto(socketfd, buf, len, 0,