diff --git a/openvpn.8 b/openvpn.8
index 525ddd54..9639f755 100644
--- a/openvpn.8
+++ b/openvpn.8
@@ -1374,7 +1374,7 @@ Causes OpenVPN to exit after
 .B n
 seconds of inactivity on the TUN/TAP device. The time length of
 inactivity is measured since the last incoming or outgoing tunnel
-packet.
+packet.  The default value is 0 seconds, which disables this feature.
 
 If the optional
 .B bytes