Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 9037)
+++ trunk/data/validator/deprecated.mapcss	(revision 9040)
@@ -549,2 +549,8 @@
   fixChangeKey: "type => substance";
 }
+
+*[landuse=farm] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "landuse=farmland";
+  fixAdd: "landuse=farmland";
+}