Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 15532)
+++ trunk/data/validator/deprecated.mapcss	(revision 15533)
@@ -1832,2 +1832,10 @@
   group: tr("deprecated tagging");
 }
+
+/* #17643 */
+way[barrier=embankment] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "man_made=embankment";
+  suggestAlternative: "embankment=yes";
+  group: tr("deprecated tagging");
+}