diff --git a/pywb/apps/frontendapp.py b/pywb/apps/frontendapp.py
index f3dec38c..c01bbe6a 100644
--- a/pywb/apps/frontendapp.py
+++ b/pywb/apps/frontendapp.py
@@ -213,6 +213,7 @@ class FrontEndApp(object):
         self.rec_cache_mode = recorder_config.get('cache')
 
         dedup_by_url = False
+        dedup_index = None
 
         policy = recorder_config.get('dedup_policy')
         if policy == 'skip':
diff --git a/wombat b/wombat
index 3f04dcdc..85396e1e 160000
--- a/wombat
+++ b/wombat
@@ -1 +1 @@
-Subproject commit 3f04dcdcb071042d498c4912599454a15c11f0e4
+Subproject commit 85396e1eb0577796356ecadc0141d89c96c68d56