diff --git a/pkg/services/apiserver/service.go b/pkg/services/apiserver/service.go
index 605016c112d..ac38dee7e3f 100644
--- a/pkg/services/apiserver/service.go
+++ b/pkg/services/apiserver/service.go
@@ -275,6 +275,8 @@ func (s *service) start(ctx context.Context) error {
 				auth := a.GetAuthorizer()
 				if auth != nil {
 					s.authorizer.Register(gv, auth)
+				} else {
+					panic("authorizer can not be nil for api group=" + gv.String())
 				}
 			}
 		}