diff --git a/beepy.lisp b/beepy.lisp
index 3d8b574..fc1f721 100644
--- a/beepy.lisp
+++ b/beepy.lisp
@@ -162,7 +162,7 @@
 
 (defun battery ()
   (list
-   (cons :percent (read-interface-numeric "battery_percentage"))
+   (cons :percent (read-interface-numeric "battery_percent"))
    (cons :raw     (read-interface-numeric "battery_raw"))
    (cons :volts   (read-interface-numeric "battery_volts"))))