diff --git a/doc/zmq_disconnect.txt b/doc/zmq_disconnect.txt
index 195c74aa..7c8ca4d8 100644
--- a/doc/zmq_disconnect.txt
+++ b/doc/zmq_disconnect.txt
@@ -1,5 +1,5 @@
 zmq_disconnect(3)
-==============
+=================
 
 
 NAME