diff --git a/examples/basics/siteConfig.js b/examples/basics/siteConfig.js
index 2f93a1713f..accc9e4abf 100644
--- a/examples/basics/siteConfig.js
+++ b/examples/basics/siteConfig.js
@@ -34,8 +34,6 @@ const siteConfig = {
   headerIcon: "img/docusaurus.svg",
   footerIcon: "img/docusaurus.svg",
   favicon: "img/favicon.png",
-  /* the name of your custom css file that resides in static/css/ */ 
-  // customCssFileName: "custom.css",
   /* colors for website */
   colors: {
     primaryColor: "#2E8555",
diff --git a/lib/core/Head.js b/lib/core/Head.js
index 9135b29bd7..983591e6b2 100644
--- a/lib/core/Head.js
+++ b/lib/core/Head.js
@@ -43,11 +43,6 @@ class Head extends React.Component {
           rel="stylesheet"
           href={this.props.config.baseUrl + "css/main.css"}
         />
-        {this.props.config.customCssFileName &&
-          <link
-            rel="stylesheet"
-            href={this.props.config.baseUrl + "css/" + this.props.config.customCssFileName}
-          />}
         <script async defer src="https://buttons.github.io/buttons.js" />
       </head>
     );
diff --git a/website/siteConfig.js b/website/siteConfig.js
index 4b18ce23db..ddc92fb176 100644
--- a/website/siteConfig.js
+++ b/website/siteConfig.js
@@ -58,7 +58,6 @@ const siteConfig = {
     apiKey: "3eb9507824b8be89e7a199ecaa1a9d2c",
     indexName: "docusaurus"
   },
-  customCssFileName: "custom.css", //the name of your custom css file
   colors: {
     primaryColor: "#2E8555",
     secondaryColor: "#205C3B",