diff --git a/docs/configuration.rst b/docs/configuration.rst
index e187a16..f146459 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -158,6 +158,8 @@ Miscellaneous
 .. tabularcolumns:: |p{6.5cm}|p{8.5cm}|
 
 ======================================= ========================================
+``SECURITY_SEND_REGISTER_EMAIL``        Specifies whether registration email is
+                                        sent. Defaults to ``True``.
 ``SECURITY_CONFIRM_EMAIL_WITHIN``       Specifies the amount of time a user has
                                         before their confirmation link expires.
                                         Always pluralized the time unit for this