diff --git a/npcf/npcf.conf.example b/npcf/npcf.conf.example
index 434cb23..08c3e45 100644
--- a/npcf/npcf.conf.example
+++ b/npcf/npcf.conf.example
@@ -17,7 +17,7 @@ NPCF_DECO_FREE_ROAMING = true
 -- Allow Guard NPC to attack players.
 NPCF_GUARD_ATTACK_PLAYERS = true
 
--- Remove Duplicate NPCs. Experimental patch for entity duplication bug in minetest.
--- Hopefully someday we can remove this.
-NPCF_REMOVE_DUPLICATES = true
-
+-- Number of seconds between Duplicate NPC removals. Set 0 to Disable.
+-- Experimental work-around for entity duplication bug in minetest engine.
+-- Hopefully someday we'll be able to remove this.
+NPCF_DUPLICATE_REMOVAL_TIME = 10