Index: trunk/src/org/openstreetmap/josm/data/validation/tests/ConditionalKeys.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/ConditionalKeys.java	(revision 14766)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/ConditionalKeys.java	(revision 14767)
@@ -32,5 +32,5 @@
             "fee", "restriction"));
     private static final Set<String> RESTRICTION_VALUES = new HashSet<>(Arrays.asList("yes", "official", "designated", "destination",
-            "delivery", "permissive", "private", "agricultural", "forestry", "no"));
+            "delivery", "customer", "permissive", "private", "agricultural", "forestry", "no"));
     private static final Set<String> TRANSPORT_MODES = new HashSet<>(Arrays.asList("access", "foot", "ski", "inline_skates", "ice_skates",
             "horse", "vehicle", "bicycle", "carriage", "trailer", "caravan", "motor_vehicle", "motorcycle", "moped", "mofa",