diff --git a/modules/jj.nix b/modules/jj.nix
index 30bdb1a..57e1c30 100644
--- a/modules/jj.nix
+++ b/modules/jj.nix
@@ -13,7 +13,7 @@
       git.write-change-id-header = true;
 
       signing = {
-        behaviour = "own";
+        behavior = "own";
         backend = "ssh";
         key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN7q0wm7C+EX0ORpRxeyhvWTT2BMPjSRQIZmbzPLIiHC";