diff --git a/modules/home/caem/desktop/gnome/default.nix b/modules/home/caem/desktop/gnome/default.nix
index 9b6be85..0a039d8 100644
--- a/modules/home/caem/desktop/gnome/default.nix
+++ b/modules/home/caem/desktop/gnome/default.nix
@@ -25,6 +25,7 @@ in {
       "video/x-matroska" = "umpv.desktop";
       "video/x-msvideo" = "umpv.desktop";
       "video/quicktime" = "umpv.desktop";
+      "x-scheme-handler/mailto" = "tutanota-desktop.desktop";
     };
   };