diff --git a/lisp/doc-view.el b/lisp/doc-view.el
index 4e28dd400ce..015e161cc89 100644
--- a/lisp/doc-view.el
+++ b/lisp/doc-view.el
@@ -1977,7 +1977,7 @@ It can be the symbol `unavailable' to indicate that outline is
 unavailable for the document.")
 
 (defvar doc-view--mutool-pdf-outline-script
-  "var document = new Document.openDocument(\"%s\", \"application/pdf\");
+  "var document = new mupdf.Document.openDocument(\"%s\");
 var outline = document.loadOutline();
 if(!outline) quit();
 function pp(outl, level){print(\"((level . \" + level + \")\");\