diff --git a/paper-api/src/main/java/org/bukkit/event/entity/EntityDamageEvent.java b/paper-api/src/main/java/org/bukkit/event/entity/EntityDamageEvent.java
index 4e6b1c2639..d1a5424ff3 100644
--- a/paper-api/src/main/java/org/bukkit/event/entity/EntityDamageEvent.java
+++ b/paper-api/src/main/java/org/bukkit/event/entity/EntityDamageEvent.java
@@ -247,6 +247,7 @@ public class EntityDamageEvent extends EntityEvent implements Cancellable {
          * raw {@link EntityDamageEvent#getDamage()}.
          */
         BASE,
+        INVULNERABILITY_REDUCTION, // Paper - fix invulnerability reduction in EntityDamageEvent - needs to be right under BASE as its the first reduction all others are based on
         /**
          * This represents the damage increased by freezing status.
          */