diff --git a/lisp/use-package/use-package-ensure-system-package.el b/lisp/use-package/use-package-ensure-system-package.el
index 9f2a59ae5e6..e4b3e32b547 100644
--- a/lisp/use-package/use-package-ensure-system-package.el
+++ b/lisp/use-package/use-package-ensure-system-package.el
@@ -23,9 +23,7 @@
 (require 'system-packages nil t)
 
 (eval-when-compile
-  (defvar system-packages-package-manager)
-  (defvar system-packages-supported-package-managers)
-  (defvar system-packages-use-sudo))
+  (declare-function system-packages-get-command "system-packages"))
 
 (defun use-package-ensure-system-package-install-command (pack)
   "Return the default install command for PACK."