diff --git a/pam_yubico.c b/pam_yubico.c
index d4721f0..e9c3460 100644
--- a/pam_yubico.c
+++ b/pam_yubico.c
@@ -475,8 +475,7 @@ do_challenge_response(struct cfg *cfg, const char *username)
   if (strcmp(response_hex, expected_response) == 0) {
     ret = PAM_SUCCESS;
   } else {
-    D(("Unexpected C/R response : %s != %s", response_hex, expected_response));
-    ret = PAM_AUTH_ERR;
+    D(("Unexpected C/R response : %s", response_hex));
     goto out;
   }