diff --git a/errors/errors.go b/errors/errors.go
index c7e432a3..20695830 100644
--- a/errors/errors.go
+++ b/errors/errors.go
@@ -107,10 +107,10 @@ func NotFoundError(msg string, args ...interface{}) error {
 	return New(NotFound, msg, args...)
 }
 
-func RateLimitError(msg string, args ...interface{}) error {
+func RateLimitError(errURL string, msg string, args ...interface{}) error {
 	return &BoulderError{
 		Type:   RateLimit,
-		Detail: fmt.Sprintf(msg+": see https://letsencrypt.org/docs/rate-limits/", args...),
+		Detail: fmt.Sprintf(msg+": see "+errURL, args...),
 	}
 }