diff --git a/package-build.el b/package-build.el
index 7151202..2bd55aa 100644
--- a/package-build.el
+++ b/package-build.el
@@ -13,7 +13,7 @@
 ;; Keywords: maint tools
 
 ;; Package-Version: 4.0.0.50-git
-;; Package-Requires: ((emacs "27.1"))
+;; Package-Requires: ((emacs "26.1") (compat "27.1"))
 
 ;; SPDX-License-Identifier: GPL-3.0-or-later