Use infinitive, not 3rd person of present tense.
diff --git a/Doc/library/ssl.rst b/Doc/library/ssl.rst
index c0b9d4a..3ac90ab 100644
--- a/Doc/library/ssl.rst
+++ b/Doc/library/ssl.rst
@@ -417,7 +417,7 @@
 
 .. method:: SSLSocket.do_handshake()
 
-   Performs the SSL setup handshake.
+   Perform the SSL setup handshake.
 
 .. method:: SSLSocket.getpeercert(binary_form=False)