diff --git a/nationstates/NScore/__init__.py b/nationstates/NScore/__init__.py
index <HASH>..<HASH> 100644
--- a/nationstates/NScore/__init__.py
+++ b/nationstates/NScore/__init__.py
@@ -172,7 +172,7 @@ class RequestMixin(ParserMixin):
                        " for Breaking the Rate Limit." +
                        " Retry-After: {seconds}".format(
                            seconds=(data["request_instance"]
-                                    .headers["Retry-After"])))
+                                    .headers["X-Retry-After"])))
             raise APIRateLimitBan(message)
         if data["status"] == 500:
             message = ("Nationstates API has returned a Internal Server Error")
Fixed Retry-After (API renamed it to x-retry-after)