diff --git a/rwx/grub/__init__.py b/rwx/grub/__init__.py
index accec9f..21b2bf5 100644
--- a/rwx/grub/__init__.py
+++ b/rwx/grub/__init__.py
@@ -35,6 +35,6 @@ def make_image(
     if pubkey_path:
         args.append(("--pubkey", pubkey_path))
     args.extend(modules)
-    if modules := MODULES.get(image_format):
-        args.extend(modules)
+    if extra_modules := MODULES.get(image_format):
+        args.extend(extra_modules)
     ps.run(*args)