diff --git a/nlsr.conf b/nlsr.conf
index 31d9633..2ddb1e4 100644
--- a/nlsr.conf
+++ b/nlsr.conf
@@ -11,6 +11,11 @@
   ; lsa-refresh-time is the time in seconds, after which router will refresh its LSAs
   lsa-refresh-time 1800      ; default value 1800. Valid values 240-7200
 
+  ; router-dead-interval is the time in seconds after which an inactive router's
+  ; LSAs are removed
+  ;router-dead-interval 3600 ; default value: 2*lsa-refresh-time. Value must be larger
+                             ; than lsa-refresh-time
+
   ; InterestLifetime (in seconds) for LSA fetching
   lsa-interest-lifetime 4    ; default value 4. Valid values 1-60