diff --git a/twilio/rest/exceptions.py b/twilio/rest/exceptions.py
index dd5df2bbb4..9ace2bf265 100644
--- a/twilio/rest/exceptions.py
+++ b/twilio/rest/exceptions.py
@@ -43,7 +43,7 @@ def teal(words):
             return u("\033[36m\033[49m%s\033[0m") % words
 
         def get_uri(code):
-            return "https://www.twilio.com/docs/errors/{}".format(code)
+            return "https://www.twilio.com/docs/errors/{0}".format(code)
 
         # If it makes sense to print a human readable error message, try to
         # do it. The one problem is that someone might catch this error and