diff --git a/modules/monit.nix b/modules/monit.nix
index adae29d..42cba30 100644
--- a/modules/monit.nix
+++ b/modules/monit.nix
@@ -42,6 +42,9 @@ in
         set mail-format { from: monit@banditlair.com }
         set alert alerts@banditlair.com with reminder on 120 cycles
 
+        check program failed-untis with path "${pkgs.systemd}/bin/systemctl --failed"
+          if content != "0 loaded units listed" then alert
+
         check system $HOST
           if cpu usage > 95% for 10 cycles then alert
           if memory usage > 75% for 5 times within 15 cycles then alert