diff --git a/middleware.js b/middleware.js
index 291d6e2ac..f0df0f645 100644
--- a/middleware.js
+++ b/middleware.js
@@ -86,7 +86,7 @@ module.exports = function(compiler, options) {
 			var cbs = callbacks;
 			callbacks = [];
 			cbs.forEach(function continueBecauseBundleAvailable(cb) {
-				cb();
+				cb(stats);
 			});
 		});
 
@@ -130,7 +130,7 @@ module.exports = function(compiler, options) {
 
 	// wait for bundle valid
 	function ready(fn, req) {
-		if(state) return fn();
+		if(state) return fn(webpackStats);
 		if(!options.noInfo && !options.quiet)
 			options.log("webpack: wait until bundle finished: " + (req.url || fn.name));
 		callbacks.push(fn);
diff --git a/test/API.test.js b/test/API.test.js
index ee3d3f672..11dbb2954 100644
--- a/test/API.test.js
+++ b/test/API.test.js
@@ -64,7 +64,9 @@ describe("Advanced API", function() {
 			var instance = middleware(compiler, options);
 			plugins.done(doneStats);
 			setTimeout(function() {
-				instance.waitUntilValid(done);
+				instance.waitUntilValid(function() {
+					done();
+				});
 			});
 		});
 
@@ -75,6 +77,17 @@ describe("Advanced API", function() {
 				instance.waitUntilValid();
 			});
 		});
+
+		it("callback should have stats argument", function(done) {
+			var instance = middleware(compiler, options);
+			plugins.done(doneStats);
+			setTimeout(function() {
+				instance.waitUntilValid(function(stats) {
+					should(stats).have.keys('hasErrors', 'hasWarnings');
+					done();
+				});
+			});
+		});
 	});
 
 	describe("invalidate", function() {