--- a/net/minecraft/world/entity/PathfinderMob.java
+++ b/net/minecraft/world/entity/PathfinderMob.java
@@ -10,6 +10,9 @@
 import net.minecraft.world.level.LevelAccessor;
 import net.minecraft.world.level.LevelReader;
 import net.minecraft.world.phys.Vec3;
+// CraftBukkit start
+import org.bukkit.event.entity.EntityUnleashEvent;
+// CraftBukkit end
 
 public abstract class PathfinderMob extends Mob {