diff --git a/src/geometries/TubeBufferGeometry.js b/src/geometries/TubeBufferGeometry.js
index a35dfb101669b0..75039491bca43a 100644
--- a/src/geometries/TubeBufferGeometry.js
+++ b/src/geometries/TubeBufferGeometry.js
@@ -27,7 +27,7 @@ function TubeBufferGeometry( path, tubularSegments, radius, radialSegments, clos
 	tubularSegments = tubularSegments || 64;
 	radius = radius || 1;
 	radialSegments = radialSegments || 8;
-	closed = closed || false;
+	closed = closed || false;
 
 	var frames = path.computeFrenetFrames( tubularSegments, closed );