Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 7391)
+++ trunk/data/validator/deprecated.mapcss	(revision 7449)
@@ -181,4 +181,9 @@
   throwWarning: tr("{0} is deprecated", "{0.key}");
   fixChangeKey: "monitoring:river_level => monitoring:water_level";
+}
+
+*[stay] {
+  throwWarning: tr("{0} is deprecated", "{0.key}");
+  fixChangeKey: "stay => maxstay";
 }