diff --git a/src/calibre/gui2/dialogs/template_dialog.py b/src/calibre/gui2/dialogs/template_dialog.py
index cd63bc1cb4..eef0abd829 100644
--- a/src/calibre/gui2/dialogs/template_dialog.py
+++ b/src/calibre/gui2/dialogs/template_dialog.py
@@ -154,7 +154,7 @@ class DocViewer(Dialog):
             self._show_function(fname)
 
     def _show_function(self, fname):
-        self.last_operation = partial(self.show_function, fname)
+        self.last_operation = partial(self._show_function, fname)
         bif = self.builtins[fname]
         if fname not in self.builtins or not bif.doc:
             self.set_html(self.header_line(fname) + self.no_doc_string())