--- a/net/minecraft/world/entity/EntityCreature.java
+++ b/net/minecraft/world/entity/EntityCreature.java
@@ -11,6 +11,10 @@
 import net.minecraft.world.level.World;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import org.bukkit.event.entity.EntityUnleashEvent;
+// CraftBukkit end
+
 public abstract class EntityCreature extends EntityInsentient {
 
     protected static final float DEFAULT_WALK_TARGET_VALUE = 0.0F;
