diff --git a/index.js b/index.js
index 6c886a3f..120315f7 100644
--- a/index.js
+++ b/index.js
@@ -284,8 +284,9 @@ ExtractTextPlugin.prototype.apply = function(compiler) {
 				if(extractedChunk.modules.length) {
 					extractedChunk.modules.sort(function(a, b) {
 						if(isInvalidOrder(a, b)) {
-							compilation.errors.push(new OrderUndefinedError(a.getOriginalModule()));
-							compilation.errors.push(new OrderUndefinedError(b.getOriginalModule()));
+							var targetLog = options.relaxInvalidOrder ? compilation.warnings : compilation.errors;
+							targetLog.push(new OrderUndefinedError(a.getOriginalModule()));
+							targetLog.push(new OrderUndefinedError(b.getOriginalModule()));
 						}
 						return getOrder(a, b);
 					});