Index: trunk/data/validator/combinations.mapcss
===================================================================
--- trunk/data/validator/combinations.mapcss	(revision 15248)
+++ trunk/data/validator/combinations.mapcss	(revision 15254)
@@ -212,5 +212,5 @@
 
 /* {0.key} without {1.key}, {2.key} or {3.key}, #17253 */
-way[oneway   ][!highway][!railway][!aerialway][attraction!=summer_toboggan],
+way[oneway   ][!highway][!railway][!aerialway][attraction!=summer_toboggan][aeroway!~/^(runway|taxiway)$/],
 *[snowplowing][!highway][!amenity][!leisure] {
   throwWarning: tr("{0} without {1}, {2} or {3}", "{0.key}", "{1.key}", "{2.key}", "{3.key}");