diff --git a/IkiWiki/Plugin/po.pm b/IkiWiki/Plugin/po.pm
index 492b05c47..45ed96c65 100644
--- a/IkiWiki/Plugin/po.pm
+++ b/IkiWiki/Plugin/po.pm
@@ -390,7 +390,7 @@ sub mybestlink ($$) { #{{{
 	my $page=shift;
 	my $link=shift;
 
-	my $res=$origsubs{'bestlink'}->($page, $link);
+	my $res=$origsubs{'bestlink'}->(masterpage($page), $link);
 	if (length $res
 	    && ($config{po_link_to} eq "current" || $config{po_link_to} eq "negotiated")
 	    && istranslatable($res)
diff --git a/doc/plugins/po.mdwn b/doc/plugins/po.mdwn
index eeeabe730..cb0dd65c0 100644
--- a/doc/plugins/po.mdwn
+++ b/doc/plugins/po.mdwn
@@ -198,14 +198,18 @@ Also, when the plugin has just been enabled, or when a page has just
 been declared as being translatable, the needed POT and PO files are
 created, and the PO files are checked into version control.
 
-Discussion pages
-----------------
+Discussion pages and other sub-pages
+------------------------------------
 
 Discussion should happen in the language in which the pages are
 written for real, *i.e.* the "master" one. If discussion pages are
 enabled, "slave" pages therefore link to the "master" page's
 discussion page.
 
+Likewise, "slave" pages are not supposed to have sub-pages;
+[[WikiLinks|wikilink]] that appear on a "slave" page therefore link to
+the master page's sub-pages.
+
 Translating
 -----------
 
@@ -499,11 +503,6 @@ gettext/po4a rough corners
 Better links
 ------------
 
-### Subpages
-
-On a translation page, links to subpages should actually be links to
-the master page's subpages. They currently appear as broken links.
-
 ### Page title in links
 
 To use the page titles set with the [[meta|plugins/meta]] plugin when