diff --git a/lib/libstand/tftp.c b/lib/libstand/tftp.c
index 0f1602608f70..eb9b56f8bd41 100644
--- a/lib/libstand/tftp.c
+++ b/lib/libstand/tftp.c
@@ -117,6 +117,8 @@ recvtftp(d, pkt, len, tleft)
 {
 	struct tftphdr *t;
 
+	errno = 0;
+
 	len = readudp(d, pkt, len, tleft);
 
 	if (len < 4)