diff --git a/hardkernel/odroid-m1/petitboot/default.nix b/hardkernel/odroid-m1/petitboot/default.nix
index 48c395a4..38b2f9e5 100644
--- a/hardkernel/odroid-m1/petitboot/default.nix
+++ b/hardkernel/odroid-m1/petitboot/default.nix
@@ -66,7 +66,7 @@ in
       system.boot.loader.id = "petitboot";
     })
 
-    (lib.mkIf config.boot.loader.petitboot.enable && options ? sdImage {
+    (lib.mkIf (config.boot.loader.petitboot.enable && options ? sdImage) {
       sdImage.populateRootCommands = lib.mkForce ''
         ${sdImageInstaller} ${args} -c ${config.system.build.toplevel} -d ./files/kboot.conf
       ''