--- a/resources/data/validator/highway.mapcss
+++ b/resources/data/validator/highway.mapcss
@@ -146,7 +146,7 @@ way[footway=none]!.not_fixable_footway {
 way[railway =~ /^(miniature|narrow_gauge|preserved|rail)$/][!highway] > node { set .is_in_railway }
 way[highway =~ /^(bridleway|cycleway|footway|path|steps)$/] > node { set .is_in_minor_road }
 way[highway =~ /^(busway|bus_guideway|living_street|motorway|motorway_link|pedestrian|primary|primary_link|raceway|residential|road|secondary|secondary_link|service|tertiary|tertiary_link|track|trunk|trunk_link|unclassified)$/] > node { set .is_in_major_road }
-node[railway!=crossing][crossing!=no].is_in_railway.is_in_minor_road!.is_in_major_road {
+node[railway!=crossing][crossing!=no][crossing!=informal].is_in_railway.is_in_minor_road!.is_in_major_road {
   throwWarning: tr("pedestrian railway crossing without {0}", "{0.tag}");
   group: tr("missing tag");
   fixAdd: "railway=crossing";