Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 15867)
+++ trunk/data/validator/deprecated.mapcss	(revision 15930)
@@ -1936,2 +1936,11 @@
   fixChangeKey: "car => motorcar";
 }
+
+/* #18767 */
+*[navigationaid=approach_light],
+*[navigationaid="ALS (Approach lighting system)"] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "navigationaid=als";
+  group: tr("deprecated tagging");
+  fixAdd: "navigationaid=als";
+}