diff --git a/stand/libsa/tftp.c b/stand/libsa/tftp.c
index f91974fbff5d..d3f3048e0257 100644
--- a/stand/libsa/tftp.c
+++ b/stand/libsa/tftp.c
@@ -677,6 +677,13 @@ tftp_preload(struct open_file *f)
 	start = getsecs();
 	printf("Preloading %s ", tftpfile->path);
 #endif
+	if (tftpfile->currblock == 1)
+		bcopy(tftpfile->tftp_hdr->th_data,
+		    cache,
+		    tftpfile->validsize);
+	else
+		tftpfile->currblock = 0;
+
 	while (tftpfile->islastblock == 0) {
 		twiddle(32);
 		rc = tftp_getnextblock(tftpfile);