Index: trunk/data/validator/territories.mapcss
===================================================================
--- trunk/data/validator/territories.mapcss	(revision 12775)
+++ trunk/data/validator/territories.mapcss	(revision 12815)
@@ -7,7 +7,7 @@
 }
 
-/* #13932 */
-*[addr:street =~ /(?i).*Strasse.*/][inside("DE,AT")],
-*[name =~ /(?i).*Strasse.*/][inside("DE,AT")] {
+/* #13932, #15283 */
+*[addr:street =~ /(?i).*Strasse.*/][addr:street !~ /(?i).*Strasser.*/][inside("DE,AT")],
+*[name =~ /(?i).*Strasse.*/][name !~ /(?i).*Strasser.*/][inside("DE,AT")] {
   throwError: tr("street name contains ss");
 }