--- loncom/interface/lonindexer.pm	2012/08/25 19:22:59	1.217
+++ loncom/interface/lonindexer.pm	2013/06/02 01:41:09	1.218
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Directory Indexer
 #
-# $Id: lonindexer.pm,v 1.217 2012/08/25 19:22:59 raeburn Exp $
+# $Id: lonindexer.pm,v 1.218 2013/06/02 01:41:09 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1356,7 +1356,7 @@ sub coursecontext {
 
 sub showpreview {
     my ($filelink)=@_;
-    if ($filelink=~m-^(/ext/|http://)-) {
+    if ($filelink=~m-^(/ext/|https?://)-) {
 	return &mt('External Resource, preview not enabled');
     }
     my ($curfext)=($filelink=~/\.(\w+)$/);