diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index 3e35b704120..75d5f1c248e 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -55,6 +55,8 @@ let
       "x-scheme-handler/ftp"
       "x-scheme-handler/mailto"
       "x-scheme-handler/webcal"
+      "x-scheme-handler/about"
+      "x-scheme-handler/unknown"
     ];
     categories = "Network;WebBrowser";
   };