diff --git a/kdc/524.c b/kdc/524.c
index 9c84494f5..d77fc3dcd 100644
--- a/kdc/524.c
+++ b/kdc/524.c
@@ -283,6 +283,7 @@ out:
 	free_EncryptedData(&ticket);
     }
     ret = krb5_storage_to_data(sp, reply);
+    reply.length = (*sp->seek)(sp, 0, SEEK_CUR);
     krb5_storage_free(sp);
     
     if(spn)