diff --git a/tailbone/views/tempmon/readings.py b/tailbone/views/tempmon/readings.py
index 7bf0e6ae..8d534ad2 100644
--- a/tailbone/views/tempmon/readings.py
+++ b/tailbone/views/tempmon/readings.py
@@ -62,7 +62,8 @@ class TempmonReadingView(MasterView):
         g.sorters['client_host'] = g.make_sorter(tempmon.Client.hostname)
         g.filters['client_host'] = g.make_filter('client_host', tempmon.Client.hostname)
 
-        g.joiners['probe'] = lambda q: q.join(tempmon.Probe)
+        g.joiners['probe'] = lambda q: q.join(tempmon.Probe,
+                                              tempmon.Probe.uuid == tempmon.Reading.probe_uuid)
         g.sorters['probe'] = g.make_sorter(tempmon.Probe.description)
         g.filters['probe'] = g.make_filter('probe', tempmon.Probe.description)