diff --git a/src/external/pac_responder.m4 b/src/external/pac_responder.m4
index 90727185b..3501b6b71 100644
--- a/src/external/pac_responder.m4
+++ b/src/external/pac_responder.m4
@@ -23,7 +23,8 @@ then
         Kerberos\ 5\ release\ 1.18* | \
         Kerberos\ 5\ release\ 1.19* | \
         Kerberos\ 5\ release\ 1.20* | \
-        Kerberos\ 5\ release\ 1.21*)
+        Kerberos\ 5\ release\ 1.21* | \
+        Kerberos\ 5\ release\ 1.22*)
             krb5_version_ok=yes
             AC_MSG_RESULT([yes])
             ;;