diff --git a/IkiWiki/Plugin/po.pm b/IkiWiki/Plugin/po.pm
index 55c1c32c6..14c7318fe 100644
--- a/IkiWiki/Plugin/po.pm
+++ b/IkiWiki/Plugin/po.pm
@@ -59,6 +59,8 @@ sub import {
 	inject(name => "IkiWiki::urlto", call => \&myurlto);
 	$origsubs{'cgiurl'}=\&IkiWiki::cgiurl;
 	inject(name => "IkiWiki::cgiurl", call => \&mycgiurl);
+	$origsubs{'rootpage'}=\&IkiWiki::rootpage;
+	inject(name => "IkiWiki::rootpage", call => \&myrootpage);
 }
 
 
@@ -649,6 +651,22 @@ sub mycgiurl (@) {
 	return $origsubs{'cgiurl'}->(%params);
 }
 
+sub myrootpage (@) {
+	my %params=@_;
+
+	my $rootpage;
+	if (exists $params{rootpage}) {
+		$rootpage=$origsubs{'bestlink'}->($params{page}, $params{rootpage});
+		if (!length $rootpage) {
+			$rootpage=$params{rootpage};
+		}
+	}
+	else {
+		$rootpage=masterpage($params{page});
+	}
+	return $rootpage;
+}
+
 # ,----
 # | Blackboxes for private data
 # `----