diff --git a/reports/nova_usage_audit.py b/reports/nova_usage_audit.py
index dd58049..37328b6 100644
--- a/reports/nova_usage_audit.py
+++ b/reports/nova_usage_audit.py
@@ -94,10 +94,14 @@ def _get_exists(beginning, ending):
 
 
 def cell_and_compute(instance, launched_at):
-    usage = InstanceUsage.find(instance, launched_at)[0]
-    deployment = usage.latest_deployment_for_request_id()
+    usage_list = InstanceUsage.find(instance, launched_at)
+    deployment = None
+    usage = None
+    if usage_list:
+        usage = usage_list[0]
+        deployment = usage.latest_deployment_for_request_id()
     cell = (deployment and deployment.name) or '-'
-    compute = usage.host() or '-'
+    compute = (usage and usage.host()) or '-'
     return cell, compute