diff --git a/nixos/modules/programs/xfs_quota.nix b/nixos/modules/programs/xfs_quota.nix
index 34a44d17e4e..129e23b7f1d 100644
--- a/nixos/modules/programs/xfs_quota.nix
+++ b/nixos/modules/programs/xfs_quota.nix
@@ -23,6 +23,7 @@ in
 
     programs.xfs_quota = {
       projects = mkOption {
+        default = {};
         type = types.attrsOf (types.submodule {
           options = {
             id = mkOption {