Index: trunk/resources/data/validator/deprecated.mapcss
===================================================================
--- trunk/resources/data/validator/deprecated.mapcss	(revision 17469)
+++ trunk/resources/data/validator/deprecated.mapcss	(revision 17593)
@@ -1473,6 +1473,6 @@
 /* #17504 */
 *[is_in],
-node[/^is_in:.*$/],
-way[/^is_in:.*$/] {
+node[/^is_in:$/],
+way[/^is_in:$/] {
   throwWarning: tr("{0} is deprecated", "{0.key}");
   group: tr("deprecated tagging");