diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index c36617bbaf80..1c400fe9e2dd 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -265,6 +265,7 @@
   };
   _6543 = {
     email = "6543@obermui.de";
+    matrix = "@marddl:obermui.de";
     github = "6543";
     githubId = 24977596;
     name = "6543";