diff --git a/packages/gatsby-cli/src/create-cli.js b/packages/gatsby-cli/src/create-cli.js
index fa4f2bcad93e5..0cdf6c0626b6c 100644
--- a/packages/gatsby-cli/src/create-cli.js
+++ b/packages/gatsby-cli/src/create-cli.js
@@ -127,7 +127,7 @@ function buildLocalCommands(cli, isLocalSite) {
       }).option(`no-uglify`, {
         type: `boolean`,
         default: false,
-        describe: `Build site without uglifying JS bundles (for debugging).`
+        describe: `Build site without uglifying JS bundles (for debugging).`,
       }),
     handler: handlerP(
       getCommandHandler(`build`, (args, cmd) => {
diff --git a/packages/gatsby/src/commands/build.js b/packages/gatsby/src/commands/build.js
index 1966dee326251..05533d41a32b6 100644
--- a/packages/gatsby/src/commands/build.js
+++ b/packages/gatsby/src/commands/build.js
@@ -18,7 +18,7 @@ type BuildArgs = {
   sitePackageJson: object,
   browserslist: string[],
   prefixPaths: boolean,
-  noUglify: boolean
+  noUglify: boolean,
 }
 
 module.exports = async function build(program: BuildArgs) {
diff --git a/packages/gatsby/src/utils/webpack.config.js b/packages/gatsby/src/utils/webpack.config.js
index 55d2aaad90c75..fe161630f9a42 100644
--- a/packages/gatsby/src/utils/webpack.config.js
+++ b/packages/gatsby/src/utils/webpack.config.js
@@ -321,22 +321,24 @@ module.exports = async (
           new GatsbyModulePlugin(),
           // new WebpackStableModuleIdAndHash({ seed: 9, hashSize: 47 }),
           new HashedChunkIdsPlugin(),
-        ];
-        if(!noUglify) {
+        ]
+        if (!noUglify) {
           // Minify JavaScript.
-          plugins.push(new webpack.optimize.UglifyJsPlugin({
-            compress: {
-              screw_ie8: true, // React doesn't support IE8
-              warnings: false,
-            },
-            mangle: {
-              screw_ie8: true,
-            },
-            output: {
-              comments: false,
-              screw_ie8: true,
-            },
-          }))
+          plugins.push(
+            new webpack.optimize.UglifyJsPlugin({
+              compress: {
+                screw_ie8: true, // React doesn't support IE8
+                warnings: false,
+              },
+              mangle: {
+                screw_ie8: true,
+              },
+              output: {
+                comments: false,
+                screw_ie8: true,
+              },
+            })
+          )
         }
         return plugins
       }