diff --git a/bridge.py b/bridge.py
index ea7215e..c587bfe 100644
--- a/bridge.py
+++ b/bridge.py
@@ -95,6 +95,8 @@ class pseudonym :
         SQL     = SQL.replace(':table',args['table'])
         if args['filter'].strip() != '' :
             SQL = SQL.replace(":filter", "WHERE "+args['filter'])
+        else:
+            SQL = SQL.replace(":filter","")
         SQL     += " ".join(['GROUP BY ',args['field'],'ORDER BY 1 '])
         TABLE_NAME = ".".join([args['dataset'],args['table']])
         credentials = service_account.Credentials.from_service_account_file(args['key'])