diff --git a/pam/pam_fprintd.c b/pam/pam_fprintd.c
index c7bb617..58d15d7 100644
--- a/pam/pam_fprintd.c
+++ b/pam/pam_fprintd.c
@@ -565,7 +565,7 @@ do_verify (sd_bus      *bus,
             }
           else if (str_equal (data->result, "verify-unknown-error"))
             {
-              return PAM_AUTH_ERR;
+              return PAM_AUTHINFO_UNAVAIL;
             }
           else if (str_equal (data->result, "verify-disconnected"))
             {
diff --git a/tests/pam/test_pam_fprintd.py b/tests/pam/test_pam_fprintd.py
index a874b64..be66818 100644
--- a/tests/pam/test_pam_fprintd.py
+++ b/tests/pam/test_pam_fprintd.py
@@ -97,7 +97,7 @@ class TestPamFprintd(dbusmock.DBusTestCase):
         ]
         self.device_mock.SetVerifyScript(script)
 
-        tc = pypamtest.TestCase(pypamtest.PAMTEST_AUTHENTICATE, expected_rv=PAM_AUTH_ERR)
+        tc = pypamtest.TestCase(pypamtest.PAMTEST_AUTHENTICATE, expected_rv=PAM_AUTHINFO_UNAVAIL)
         res = pypamtest.run_pamtest("toto", "fprintd-pam-test", [tc], [ 'unused' ])
 
         self.assertRegex(res.info[0], r'Swipe your left little finger across the fingerprint reader')