diff --git a/tagpdf-tree.dtx b/tagpdf-tree.dtx
index f7ae6de9..e5c702fa 100644
--- a/tagpdf-tree.dtx
+++ b/tagpdf-tree.dtx
@@ -118,7 +118,7 @@
 %    \end{macrocode}
 % \end{variable}
 % 
-% \begin{macro}{viewer/startpage (setup-key)}
+% \begin{macro}{viewer/startstructure (setup-key)}
 % We also need an option to setup the start structure. So we setup a key
 % which sets the variable to the current structure. This still requires
 % hyperref to do most of the job, this should perhaps be changed.