Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 10511)
+++ trunk/data/validator/deprecated.mapcss	(revision 10538)
@@ -1,4 +1,5 @@
 *[barrier=wire_fence] {
   throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "barrier=fence + fence_type=chain_link";
   fixAdd: "barrier=fence";
   fixAdd: "fence_type=chain_link";
@@ -869,2 +870,11 @@
   fixRemove: "tower";
 }
+
+/* #13138 */
+area[landuse=pond] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "natural=water + water=pond";
+  fixAdd: "natural=water";
+  fixAdd: "water=pond";
+  fixRemove: "landuse";
+}