fix doc string
diff --git a/doc/api/ssl.rst b/doc/api/ssl.rst
index 1f6b1f3..ad4fd05 100644
--- a/doc/api/ssl.rst
+++ b/doc/api/ssl.rst
@@ -41,9 +41,9 @@
 .. py:data:: OP_SINGLE_DH_USE
              OP_SINGLE_ECDH_USE
 
-    Constant used with :py:meth:`set_options` of Context objects.
+    Constants used with :py:meth:`set_options` of Context objects.
 
-    When this option is used, a new key will always be created when using
+    When these options are used, a new key will always be created when using
     ephemeral (Elliptic curve) Diffie-Hellman.