diff --git a/systems/configuration.nix b/systems/configuration.nix
index d606003..dac0455 100644
--- a/systems/configuration.nix
+++ b/systems/configuration.nix
@@ -199,7 +199,7 @@
       options = "--delete-older-than 30d";
     };
 
-    optimize = {
+    optimise = {
       automatic = true;
       dates = [ "01:00" ];
     };