diff --git a/ietf/secr/proceedings/proc_utils.py b/ietf/secr/proceedings/proc_utils.py
index 28aa3c4ee..30e8299e0 100644
--- a/ietf/secr/proceedings/proc_utils.py
+++ b/ietf/secr/proceedings/proc_utils.py
@@ -40,11 +40,11 @@ def check_audio_files(group,meeting):
     Example: ietf90-salonb-20140721-1710-pm3.mp3
     
     '''
-    for session in Session.objects.filter(group=group,meeting=meeting,status='sched'):
-        try:
-            timeslot = session.official_timeslotassignment().timeslot
-        except IndexError:
-            continue
+    for session in Session.objects.filter(group=group,
+                                          meeting=meeting,
+                                          status=('sched'),
+                                          timeslotassignments__schedule=meeting.agenda):
+        timeslot = session.official_timeslotassignment().timeslot
         if not (timeslot.location and timeslot.time):
             continue
         room = timeslot.location.name.lower()