1 files changed, 1 insertions, 1 deletions

diff --git a/src/gnutls.c b/src/gnutls.c
index cab24048e56..864cac5f511 100644
--- a/src/gnutls.c
+++ b/src/gnutls.c
@@ -1512,7 +1512,7 @@ one trustfile (usually a CA bundle).  */)
           || !NILP (Fmember (QCgnutls_bootprop_trustfiles, verify_error)))
         {
           emacs_gnutls_deinit (proc);
-          error ("Certificate validation failed %s, verification code %u",
+          error ("Certificate validation failed %s, verification code %x",
                  c_hostname, peer_verification);
         }
       else