diff --git a/Lua-NPC.md b/Lua-NPC.md
index 814e5b4..41451bf 100644
--- a/Lua-NPC.md
+++ b/Lua-NPC.md
@@ -98,4 +98,6 @@ Integer GetSpawnKillCount();
 Integer GetScore();
 Void MerchantOpenShop();
 Void MerchantCloseShop();
+Integer GetMerchantProbability();
+Void SetMerchantProbability(Integer new_item_spawn_probability);
 ```
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