diff --git a/modules/home/delta/default.nix b/modules/home/delta/default.nix
index eddc72e6..b301d2b6 100644
--- a/modules/home/delta/default.nix
+++ b/modules/home/delta/default.nix
@@ -86,10 +86,8 @@ in
         };
 
         ui = {
-          diff = {
-            # Delta expects a `git diff` input
-            format = "git";
-          };
+          # Delta expects a `git diff` input
+          diff-formatter = ":git";
 
           pager = "${lib.getExe cfg.package}";
         };