diff --git a/lib/krb5/get_in_tkt.c b/lib/krb5/get_in_tkt.c
index 62e420009..07b70b3f7 100644
--- a/lib/krb5/get_in_tkt.c
+++ b/lib/krb5/get_in_tkt.c
@@ -78,7 +78,7 @@ check_server_referral(krb5_context context,
 		      unsigned flags,
 		      krb5_const_principal requested,
 		      krb5_const_principal returned,
-		      const krb5_keyblock const * key)
+		      krb5_keyblock * key)
 {
     krb5_error_code ret;
     PA_ServerReferralData ref;