diff --git a/types/karma-webpack/index.d.ts b/types/karma-webpack/index.d.ts
index 988e510b56..73e65a39f5 100644
--- a/types/karma-webpack/index.d.ts
+++ b/types/karma-webpack/index.d.ts
@@ -36,6 +36,6 @@ declare module 'karma' {
 
     interface ConfigOptions {
         webpack: Webpack.Configuration;
-        webpackMiddlewareOptions: KarmaWebpackMiddlewareOptions;
+        webpackMiddleware: KarmaWebpackMiddlewareOptions;
     }
 }
diff --git a/types/karma-webpack/karma-webpack-tests.ts b/types/karma-webpack/karma-webpack-tests.ts
index b04b02f9db..75110b7540 100644
--- a/types/karma-webpack/karma-webpack-tests.ts
+++ b/types/karma-webpack/karma-webpack-tests.ts
@@ -8,7 +8,7 @@ export default function(config: karma.Config): void {
         frameworks: ['jasmine'],
         preprocessors: {'src/index.spec.ts': ['webpack', 'sourcemap']},
         webpack: {entry: 'test.js'},
-        webpackMiddlewareOptions: {noInfo: true},
+        webpackMiddleware: {noInfo: true},
         reporters: ['spec']
     });
 }