diff --git a/src/c3nav/mapdata/models/geometry/space.py b/src/c3nav/mapdata/models/geometry/space.py
index a8d6d4f5..7684c6b6 100644
--- a/src/c3nav/mapdata/models/geometry/space.py
+++ b/src/c3nav/mapdata/models/geometry/space.py
@@ -528,6 +528,9 @@ class RangingBeacon(SpaceGeometryMixin, models.Model):
 
     altitude_quest = models.BooleanField(_('altitude quest'), default=True)
 
+    num_clients = models.IntegerField(_('current number of clients'), default=0)
+    max_observed_num_clients = models.IntegerField(_('highest observed number of clients'), default=0)
+
     class Meta:
         verbose_name = _('Ranging beacon')
         verbose_name_plural = _('Ranging beacons')