diff --git a/odoo-rpc.py b/odoo-rpc.py
index 1c09b1b..d17bb93 100755
--- a/odoo-rpc.py
+++ b/odoo-rpc.py
@@ -337,7 +337,7 @@ def flatten_stack( data ):
 	flat = []
 	
 	if type(data) == str:
-		return data
+		return [ data ]
 	
 	if type(data) == list:
 		res = [ flatten_stack( sub ) for sub in data ]