diff --git a/src/main/java/net/citizensnpcs/api/npc/NPC.java b/src/main/java/net/citizensnpcs/api/npc/NPC.java
index 1c6d6778..6e434e6e 100644
--- a/src/main/java/net/citizensnpcs/api/npc/NPC.java
+++ b/src/main/java/net/citizensnpcs/api/npc/NPC.java
@@ -399,6 +399,10 @@ public interface NPC extends Agent, Cloneable {
      * The Item ID. Integer.
      */
     public static final String ITEM_ID_METADATA = "item-type-id";
+    /**
+     * Whether to keep chunk loaded. Boolean.
+     */
+    public static final String KEEP_CHUNK_LOADED_METADATA = "keep-chunk-loaded";
     /**
      * Whether the NPC is leashable. Boolean.
      */