diff --git a/src/cameras/Camera.d.ts b/src/cameras/Camera.d.ts
index 77b9f1114ea0a86b9b8dba194a461d8008d0541d..f858802d7208cf985d367037f38236a0413b0bee 100644
--- a/src/cameras/Camera.d.ts
+++ b/src/cameras/Camera.d.ts
@@ -31,8 +31,6 @@ export class Camera extends Object3D {
 
 	isCamera: true;
 
-	copy( source: Camera, recursive?: boolean ): this;
-
 	getWorldDirection( target: Vector3 ): Vector3;
 
 	updateMatrixWorld( force?: boolean ): void;
diff --git a/src/core/Object3D.d.ts b/src/core/Object3D.d.ts
index 8de3bc72c3ccb45e5341729988bf50b36a1f84da..f3612b088c637a43df0aed4dd97ff0eded7d83b0 100644
--- a/src/core/Object3D.d.ts
+++ b/src/core/Object3D.d.ts
@@ -346,6 +346,6 @@ export class Object3D extends EventDispatcher {
 	 * @param object
 	 * @param recursive
 	 */
-	copy( source: Object3D, recursive?: boolean ): this;
+	copy( source: this, recursive?: boolean ): this;
 
 }
diff --git a/src/objects/Mesh.d.ts b/src/objects/Mesh.d.ts
index 4a0746733aaa4277c271c9785ded950e866749d6..3a8b6176ffdfa1865f328f1dbc2f5ea93f749b31 100644
--- a/src/objects/Mesh.d.ts
+++ b/src/objects/Mesh.d.ts
@@ -24,6 +24,5 @@ export class Mesh extends Object3D {
 	setDrawMode( drawMode: TrianglesDrawModes ): void;
 	updateMorphTargets(): void;
 	raycast( raycaster: Raycaster, intersects: Intersection[] ): void;
-	copy( source: this, recursive?: boolean ): this;
 
 }
diff --git a/src/scenes/Scene.d.ts b/src/scenes/Scene.d.ts
index 750a1210d603891630d0f19cb938aaf66cdcd5cf..1e776724c9bc1d0d91b5e93491953b2277afa1ee 100644
--- a/src/scenes/Scene.d.ts
+++ b/src/scenes/Scene.d.ts
@@ -26,7 +26,6 @@ export class Scene extends Object3D {
 	autoUpdate: boolean;
 	background: null | Color | Texture;
 
-	copy( source: this, recursive?: boolean ): this;
 	toJSON( meta?: any ): any;
 	dispose(): void;