--- a/net/minecraft/world/item/trading/IMerchant.java
+++ b/net/minecraft/world/item/trading/IMerchant.java
@@ -54,4 +54,6 @@
     boolean isClientSide();
 
     boolean stillValid(EntityHuman entityhuman);
+
+    org.bukkit.craftbukkit.inventory.CraftMerchant getCraftMerchant(); // CraftBukkit
 }