diff --git a/builder/iso_builder.py b/builder/iso_builder.py
index e3a53c36..a3a2df07 100644
--- a/builder/iso_builder.py
+++ b/builder/iso_builder.py
@@ -338,6 +338,7 @@ def iso_builder_main(
         boot_cmdline=iso_build_config['iso_config']['iso'].get('boot_cmdline', ''),
         Volume_ID=Volume_ID,
         paths=paths,
+        initrd_path=initrd_path,
     )
     if isolinux_dir:
         logger.info(f"=> Isolinux bootloader generated at: {isolinux_dir}")