diff --git a/source/c11/p10_add_ssl_to_network_services.rst b/source/c11/p10_add_ssl_to_network_services.rst
index 53bc8dd..8fe9f38 100644
--- a/source/c11/p10_add_ssl_to_network_services.rst
+++ b/source/c11/p10_add_ssl_to_network_services.rst
@@ -81,10 +81,10 @@
     import ssl
 
     class SSLMixin:
-    '''
-    Mixin class that adds support for SSL to existing servers based
-    on the socketserver module.
-    '''
+        '''
+        Mixin class that adds support for SSL to existing servers based
+        on the socketserver module.
+        '''
         def __init__(self, *args,
                      keyfile=None, certfile=None, ca_certs=None,
                      cert_reqs=ssl.CERT_NONE,