diff --git a/src/Three.Legacy.js b/src/Three.Legacy.js
index 919d1485e90c22264ce898ce6f853ca3e03d9fca..791997fff34196a848941e453c3a425d248c81d9 100644
--- a/src/Three.Legacy.js
+++ b/src/Three.Legacy.js
@@ -470,6 +470,7 @@ Object.assign( Matrix4.prototype, {
 	makeFrustum: function( left, right, bottom, top, near, far ) {
 
 		console.error( 'THREE.Matrix4: .makeFrustum() has been renamed to .makePerspective().' );
+		return this.makePerspective( left, right, bottom, top, near, far );
 
 	}