diff --git a/pywb/manager/manager.py b/pywb/manager/manager.py
index 06de6e57..a770b725 100644
--- a/pywb/manager/manager.py
+++ b/pywb/manager/manager.py
@@ -228,6 +228,8 @@ def _add_wacz_index(self, collection_index_path, wacz_index_path, filename_mappi
                 wacz_index = open(wacz_index_path, 'rb')
 
             for line in wacz_index:
+                if not line:
+                    continue
                 cdx_object = CDXObject(cdxline=line)
                 if cdx_object['filename'] in filename_mapping:
                     cdx_object['filename'] = filename_mapping[cdx_object['filename']]