diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 15fa7b1ac36..75e8446523f 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -332,6 +332,7 @@
   ./services/mail/rspamd.nix
   ./services/mail/rss2email.nix
   ./services/mail/rmilter.nix
+  ./services/mail/roundcube.nix
   ./services/mail/nullmailer.nix
   ./services/misc/airsonic.nix
   ./services/misc/apache-kafka.nix