diff --git a/backdrop/core/database.py b/backdrop/core/database.py
index 7314fbc8..63e7cb98 100644
--- a/backdrop/core/database.py
+++ b/backdrop/core/database.py
@@ -60,7 +60,7 @@ def collection_exists(self, collection_name):
 
     def create_uncapped_collection(self, collection_name):
         return self.mongo_database.create_collection(
-            name=collection_name, capped=False, size=0)
+            name=collection_name, capped=False)
 
     def create_capped_collection(self, collection_name, capped_size):
         return self.mongo_database.create_collection(name=collection_name,