diff --git a/users/myuser/graphical/thunderbird.nix b/users/myuser/graphical/thunderbird.nix
index 26684ea..54c4292 100644
--- a/users/myuser/graphical/thunderbird.nix
+++ b/users/myuser/graphical/thunderbird.nix
@@ -98,6 +98,7 @@ in {
 
   xdg.mimeApps.defaultApplications = {
     "x-scheme-handler/mailto" = ["thunderbird.desktop"];
+    "x-scheme-handler/mid" = ["thunderbird.desktop"];
     "message/rfc822" = ["thunderbird.desktop"];
   };
 }