diff --git a/paper-api/src/main/java/org/bukkit/boss/DragonBattle.java b/paper-api/src/main/java/org/bukkit/boss/DragonBattle.java
index 8c55741cd1..6e5fc92243 100644
--- a/paper-api/src/main/java/org/bukkit/boss/DragonBattle.java
+++ b/paper-api/src/main/java/org/bukkit/boss/DragonBattle.java
@@ -56,6 +56,17 @@ public interface DragonBattle {
      */
     public boolean hasBeenPreviouslyKilled();
 
+    /**
+     * Sets whether the first dragon has been killed already.
+     * <br>
+     * If the dragon has not previously been killed, a portal will be generated
+     * when it is finally killed.
+     *
+     * @param previouslyKilled true if the dragon has been killed before, false
+     * otherwise
+     */
+    public void setPreviouslyKilled(boolean previouslyKilled);
+
     /**
      * Try to initiate a respawn sequence to summon the dragon as though a player has
      * placed 4 end crystals on the portal.