diff --git a/modules/tools/pdf/autoload/pdf.el b/modules/tools/pdf/autoload/pdf.el
index 265c14396..29818bc36 100644
--- a/modules/tools/pdf/autoload/pdf.el
+++ b/modules/tools/pdf/autoload/pdf.el
@@ -23,7 +23,7 @@
       1)))
 
 ;;;###autoload
-(defun +pdf--view-use-scaling-p-a (orig-fn)
+(defun +pdf--view-use-scaling-p-a ()
   "Returns t if on ns window-system on Emacs 27+."
   (and (eq (framep-on-display) 'ns)
        EMACS27+