diff --git a/locales/en-US.json b/locales/en-US.json
index cc590e9e..183c519c 100644
--- a/locales/en-US.json
+++ b/locales/en-US.json
@@ -428,5 +428,6 @@
     "footer_documentation": "Documentation",
     "footer_source_code": "Source code",
     "footer_original_source_code": "Original source code",
-    "footer_modfied_source_code": "Modified Source code"
+    "footer_modfied_source_code": "Modified Source code",
+    "adminprefs_modified_source_code_url_label": "URL to modified source code repository"
 }
diff --git a/src/invidious/routes/preferences.cr b/src/invidious/routes/preferences.cr
index 0f26ec15..2b9ec5fe 100644
--- a/src/invidious/routes/preferences.cr
+++ b/src/invidious/routes/preferences.cr
@@ -198,6 +198,8 @@ module Invidious::Routes::PreferencesRoute
         statistics_enabled ||= "off"
         CONFIG.statistics_enabled = statistics_enabled == "on"
 
+        CONFIG.modified_source_code_url = env.params.body["modified_source_code_url"]?.try &.as(String)
+
         File.write("config/config.yml", CONFIG.to_yaml)
       end
     else
diff --git a/src/invidious/views/preferences.ecr b/src/invidious/views/preferences.ecr
index be021c59..401c15ea 100644
--- a/src/invidious/views/preferences.ecr
+++ b/src/invidious/views/preferences.ecr
@@ -286,6 +286,11 @@
                     <label for="statistics_enabled"><%= translate(locale, "Report statistics: ") %></label>
                     <input name="statistics_enabled" id="statistics_enabled" type="checkbox" <% if CONFIG.statistics_enabled %>checked<% end %>>
                 </div>
+
+                <div class="pure-control-group">
+                    <label for="modified_source_code_url"><%= translate(locale, "adminprefs_modified_source_code_url_label") %></label>
+                    <input name="modified_source_code_url" id="modified_source_code_url" type="input" <% if CONFIG.modified_source_code_url %>checked<% end %>>
+                </div>
             <% end %>
 
             <% if env.get? "user" %>