diff --git a/lib/optimize/MinChunkSizePlugin.js b/lib/optimize/MinChunkSizePlugin.js
index 6df8ffa85..b10bebd10 100644
--- a/lib/optimize/MinChunkSizePlugin.js
+++ b/lib/optimize/MinChunkSizePlugin.js
@@ -3,7 +3,7 @@
 	Author Tobias Koppers @sokra
 */
 function MinChunkSizePlugin(options) {
-	if(options !== undefined && typeof options !== "object" || Array.isArray(options)) {
+	if(typeof options !== "object" || Array.isArray(options)) {
 		throw new Error("Argument should be an options object.\nFor more info on options, see http://webpack.github.io/docs/list-of-plugins.html");
 	}
 	this.options = options;