diff --git a/etc/ironic/ironic.conf.sample b/etc/ironic/ironic.conf.sample
index 8be30e68ba..b01d34c1a0 100644
--- a/etc/ironic/ironic.conf.sample
+++ b/etc/ironic/ironic.conf.sample
@@ -43,6 +43,10 @@
 # Whether to disable the Nagle algorithm. (boolean value)
 #qpid_tcp_nodelay=true
 
+# The number of prefetched messages held by receiver. (integer
+# value)
+#qpid_receiver_capacity=1
+
 # The qpid topology version to use.  Version 1 is what was
 # originally used by impl_qpid.  Version 2 includes some
 # backwards-incompatible changes that allow broker federation