diff --git a/doc/zmq_socket.txt b/doc/zmq_socket.txt
index c5fb43a4..ba65eb12 100644
--- a/doc/zmq_socket.txt
+++ b/doc/zmq_socket.txt
@@ -150,7 +150,8 @@ Action in mute state:: Return EAGAIN
 
 
 Radio-dish pattern
-~~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~
+
 The radio-dish pattern is used for one-to-many distribution of data from
 a single _publisher_ to multiple _subscribers_ in a fan out fashion.