diff --git a/doc/Extensions/Agent-Setup.md b/doc/Extensions/Agent-Setup.md
index c6fcef3136..b262397eeb 100644
--- a/doc/Extensions/Agent-Setup.md
+++ b/doc/Extensions/Agent-Setup.md
@@ -3,6 +3,8 @@ Agent setup
 
 To gather data from remote systems you can use LibreNMS in combination with check_mk (included in the scripts directory).
 
+Make sure that ixnetd is installed on the host you want to run the agent on.
+
 The agent uses TCP-Port 6556, please allow access from the LibreNMS-Host and Poller-Nodes if you're using the Distributed Polling setup.
 
 On each of the hosts you would like to use the agent on then you need to do the following: