diff --git a/lib/krb5/sendauth.c b/lib/krb5/sendauth.c
index ec41d0786..087f5e735 100644
--- a/lib/krb5/sendauth.c
+++ b/lib/krb5/sendauth.c
@@ -41,21 +41,23 @@ krb5_sendauth(krb5_context context,
 {
   krb5_error_code ret;
   int fd = *((int *)p_fd);
-  u_int32_t len;
-  const char *version = "KRB5_SENDAUTH_V1.0";
+  u_int32_t len, net_len;
+  const char *version = KRB5_SENDAUTH_VERSION;
   u_char repl;
   krb5_data ap_req;
   krb5_creds this_cred;
   krb5_creds *creds;
 
-  len = htonl(strlen(version) + 1);
-  if (krb5_net_write (context, fd, &len, 4) != 4
-      || krb5_net_write (context, fd, version, ntohl(len)) != ntohl(len))
+  len = strlen(version) + 1;
+  net_len = htonl(net_len);
+  if (krb5_net_write (context, fd, &net_len, 4) != 4
+      || krb5_net_write (context, fd, version, len) != len)
     return errno;
 
-  len = htonl(strlen(appl_version) + 1);
-  if (krb5_net_write (context, fd, &len, 4) != 4
-      || krb5_net_write (context, fd, appl_version, ntohl(len)) != ntohl(len))
+  len = strlen(appl_version) + 1;
+  net_len = htonl(len);
+  if (krb5_net_write (context, fd, &net_len, 4) != 4
+      || krb5_net_write (context, fd, appl_version, len) != len)
     return errno;
 
   if (krb5_net_read (context, fd, &repl, sizeof(repl)) != sizeof(repl))