diff --git a/lesson_111_quaternion_cone_constraint/fungi/Ecs.js b/lesson_111_quaternion_cone_constraint/fungi/Ecs.js
index 5d5509a..b616cf5 100644
--- a/lesson_111_quaternion_cone_constraint/fungi/Ecs.js
+++ b/lesson_111_quaternion_cone_constraint/fungi/Ecs.js
@@ -233,7 +233,7 @@ class Ecs{
 			let e = this.Entities.get(eID);
 			if(e){
 				Entity.dispose( e );
-				this.Entities.remove( eID );
+				this.Entities.delete( eID );
 			}else console.log("Entity does not exist when trying to remove : ", eID);
 
 			return this;
@@ -335,4 +335,4 @@ class Ecs{
 
 ///////////////////////////////////////////////////////////////////////////////////
 export { Components, Assemblages, Entity, System };
-export default Ecs;
\ No newline at end of file
+export default Ecs;