diff --git a/README.md b/README.md
index e9925c5..ad40bbe 100644
--- a/README.md
+++ b/README.md
@@ -303,6 +303,20 @@ use_full_hack_font = true
 
 Also see [Hack's docs](https://github.com/source-foundry/Hack/blob/master/docs/WEBFONT_USAGE.md).
 
+### Favicon
+
+The theme supports adding a global favicon (applies to
+all pages) to the site:
+
+```toml
+# Optional: Global favicon URL and mimetype.
+#           Mimetype defaults to "image/x-icon".
+#           The URL should point at a file located
+#           in your site's "static" directory.
+favicon = "/favicon.png"
+favicon_mimetype = "image/png"
+```
+
 All the configuration options are also described in
 [`config.toml`](../blob/master/config.toml).
 
diff --git a/config.toml b/config.toml
index 49188f5..ae8353c 100644
--- a/config.toml
+++ b/config.toml
@@ -70,3 +70,10 @@ post_view_navigation_prompt = "Thanks for reading! Read other posts?"
 # Switch this to true if you need full unicode support.
 # Defaults to false.
 use_full_hack_font = false
+
+# Optional: Global favicon URL and mimetype.
+#           Mimetype defaults to "image/x-icon".
+#           The URL should point at a file located
+#           in your site's "static" directory.
+# favicon = "/favicon.png"
+# favicon_mimetype = "image/png"
diff --git a/templates/index.html b/templates/index.html
index a577dae..67ec0f0 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -14,6 +14,10 @@
         <link rel="alternate" type="application/rss+xml" title="RSS" href="{{ get_url(path="rss.xml") }}">
     {% endif -%}
 
+    {%- if config.extra.favicon %}
+        <link rel="icon" type="{{ config.extra.favicon_mimetype | default(value="image/x-icon") }}" href="{{ config.extra.favicon }}">
+    {% endif -%}
+
     {%- block extra_head %}
     {% endblock extra_head -%}
 </head>