diff --git a/fence/blueprints/data/indexd.py b/fence/blueprints/data/indexd.py
index 00bf8436d..186f08bcc 100755
--- a/fence/blueprints/data/indexd.py
+++ b/fence/blueprints/data/indexd.py
@@ -169,7 +169,7 @@ def get_signed_url_for_file(
 
 
 def _log_signed_url_data_info(indexed_file, user_sub, requested_protocol):
-    size_in_kibibytes = indexed_file.index_document.get("size", 0) / 1024
+    size_in_kibibytes = (indexed_file.index_document.get("size") or 0) / 1024
     acl = indexed_file.index_document.get("acl")
     authz = indexed_file.index_document.get("authz")