Index: src/wp-includes/js/wplink.js
===================================================================
--- src/wp-includes/js/wplink.js	(revision 32704)
+++ src/wp-includes/js/wplink.js	(working copy)
@@ -354,7 +354,7 @@
 			}
 
 			link = getLink();
-			text = inputs.text.val();
+			text = inputs.text.val() || attrs.href;
 
 			if ( link ) {
 				if ( text ) {