diff --git a/modules/launchd/launchd.nix b/modules/launchd/launchd.nix
index 9fecde66..9e13a3b6 100644
--- a/modules/launchd/launchd.nix
+++ b/modules/launchd/launchd.nix
@@ -675,6 +675,15 @@ with lib;
       '';
     };
 
+    LowPriorityBackgroundIO = mkOption {
+      type = types.nullOr types.bool;
+      default = null;
+      description = ''
+        This optional key specifies whether the kernel should consider this daemon to be low priority when
+        doing file system I/O when the process is throttled with the Darwin-background classification.
+      '';
+    };
+
     LaunchOnlyOnce = mkOption {
       type = types.nullOr types.bool;
       default = null;