diff --git a/conf_schema.h b/conf_schema.h
index 90d8a4f7..8ffc44bb 100644
--- a/conf_schema.h
+++ b/conf_schema.h
@@ -299,6 +299,7 @@ END_STRUCT
 
 STRUCT(rhizome_advertise)
 ATOM(int,                   enable,     1, cf_opt_int_boolean,, "If true, Rhizome advertisements are sent")
+ATOM(uint32_t,              interval,   500, cf_opt_uint32_nonzero,, "Interval between Rhizome advertisements")
 END_STRUCT
 
 STRUCT(rhizome)
diff --git a/rhizome_packetformats.c b/rhizome_packetformats.c
index b6a97769..114cda05 100644
--- a/rhizome_packetformats.c
+++ b/rhizome_packetformats.c
@@ -223,7 +223,7 @@ void overlay_rhizome_advertise(struct sched_ent *alarm){
   
 end:
   sqlite_set_tracefunc(oldfunc);
-  alarm->alarm = gettime_ms()+500;
+  alarm->alarm = gettime_ms()+config.rhizome.advertise.interval;
   alarm->deadline = alarm->alarm+10000;
   schedule(alarm);
 }