diff --git a/IkiWiki.pm b/IkiWiki.pm
index e963471e4..ef8ccb2da 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -1068,6 +1068,14 @@ sub baseurl (;$) {
 	return $page;
 }
 
+sub urlabs ($$) {
+	my $url=shift;
+	my $urlbase=shift;
+
+	eval q{use URI};
+	URI->new_abs($url, $urlbase)->as_string;
+}
+
 sub abs2rel ($$) {
 	# Work around very innefficient behavior in File::Spec if abs2rel
 	# is passed two relative paths. It's much faster if paths are
diff --git a/IkiWiki/CGI.pm b/IkiWiki/CGI.pm
index e8850cc54..f1bec6b8f 100644
--- a/IkiWiki/CGI.pm
+++ b/IkiWiki/CGI.pm
@@ -59,26 +59,16 @@ sub showform_preview ($$$$;@) {
 	my %params=@_;
 
 	# The base url needs to be a full URL, and urlto may return a path.
-	my $baseurl = absurl(urlto($params{page}), $cgi);
+	my $baseurl = urlabs(urlto($params{page}), $cgi->url);
 
 	showform($form, $buttons, $session, $cgi, @_,
 		forcebaseurl => $baseurl);
 }
 
-# Forces a partial url (path only) to absolute, using the same
-# URL scheme as the CGI. Full URLs are left unchanged.
-sub absurl ($$) {
-	my $partialurl=shift;
-	my $q=shift;
-
-	eval q{use URI};
-	return URI->new_abs($partialurl, $q->url);
-}
-
 sub redirect ($$) {
 	my $q=shift;
 	eval q{use URI};
-	my $url=URI->new(absurl(shift, $q));
+	my $url=URI->new(urlabs(shift, $q->url));
 	if (! $config{w3mmode}) {
 		print $q->redirect($url);
 	}
diff --git a/IkiWiki/Plugin/aggregate.pm b/IkiWiki/Plugin/aggregate.pm
index 9b70e5df0..59185e97f 100644
--- a/IkiWiki/Plugin/aggregate.pm
+++ b/IkiWiki/Plugin/aggregate.pm
@@ -8,7 +8,6 @@ use IkiWiki 3.00;
 use HTML::Parser;
 use HTML::Tagset;
 use HTML::Entities;
-use URI;
 use open qw{:utf8 :std};
 
 my %feeds;
@@ -660,7 +659,7 @@ sub add_page (@) {
 	$template->param(url => $feed->{url});
 	$template->param(copyright => $params{copyright})
 		if defined $params{copyright} && length $params{copyright};
-	$template->param(permalink => urlabs($params{link}, $feed->{feedurl}))
+	$template->param(permalink => IkiWiki::urlabs($params{link}, $feed->{feedurl}))
 		if defined $params{link};
 	if (ref $feed->{tags}) {
 		$template->param(tags => [map { tag => $_ }, @{$feed->{tags}}]);
@@ -688,13 +687,6 @@ sub wikiescape ($) {
 	return encode_entities(shift, '\[\]');
 }
 
-sub urlabs ($$) {
-	my $url=shift;
-	my $urlbase=shift;
-
-	URI->new_abs($url, $urlbase)->as_string;
-}
-
 sub htmlabs ($$) {
 	# Convert links in html from relative to absolute.
 	# Note that this is a heuristic, which is not specified by the rss
@@ -720,7 +712,7 @@ sub htmlabs ($$) {
 				next unless $v_offset; # 0 v_offset means no value
 				my $v = substr($text, $v_offset, $v_len);
 				$v =~ s/^([\'\"])(.*)\1$/$2/;
-				my $new_v=urlabs($v, $urlbase);
+				my $new_v=IkiWiki::urlabs($v, $urlbase);
 				$new_v =~ s/\"/"/g; # since we quote with ""
 				substr($text, $v_offset, $v_len) = qq("$new_v");
 			}