Index: trunk/data/validator/combinations.mapcss
===================================================================
--- trunk/data/validator/combinations.mapcss	(revision 11080)
+++ trunk/data/validator/combinations.mapcss	(revision 11133)
@@ -305,5 +305,5 @@
 
 /* #9593, #11183, #12418, #12761 */
-*[sport][!building][!club][tourism != hotel][highway != raceway][leisure !~ /^(sports_centre|stadium|track|pitch|golf_course|water_park|swimming_pool|recreation_ground|ice_rink)$/][natural !~ /^(beach|bare_rock|cliff|peak|water)$/][amenity !~ /^(pub|restaurant|swimming_pool)$/][landuse !~ /^(recreation_ground|piste|farm|farmland)$/][barrier !~ /^(wall|retaining_wall)$/][!"piste:type"][shop!=sports] {
+*[sport][!building][!club][tourism != hotel][highway != raceway][leisure !~ /^(sports_centre|stadium|track|pitch|golf_course|water_park|swimming_pool|recreation_ground|ice_rink|horse_riding)$/][natural !~ /^(beach|bare_rock|cliff|peak|water)$/][amenity !~ /^(pub|restaurant|swimming_pool)$/][landuse !~ /^(recreation_ground|piste|farm|farmland)$/][barrier !~ /^(wall|retaining_wall)$/][!"piste:type"][shop!=sports] {
     throwWarning: tr("sport without physical feature");
     assertMatch: "node sport=tennis";