diff --git a/src/iosource/af_packet/README b/src/iosource/af_packet/README
index b23e4c4b0a..fe798f3712 100644
--- a/src/iosource/af_packet/README
+++ b/src/iosource/af_packet/README
@@ -98,6 +98,7 @@ be utilized. The following shows an exemplary configuration::
     # Optional parameters for per node configuration:
     af_packet_fanout_id=23
     af_packet_fanout_mode=AF_Packet::FANOUT_HASH
+    af_packet_buffer_size=128*1024*1024
 
 If all interfaces using ``lb_method=custom`` should be configured for AF_Packet, the
 prefix can be globally definied by adding the following line to ``broctl.conf``::