diff --git a/include/grub/i386/bsd.h b/include/grub/i386/bsd.h
index 4f5d5d1ee..b431658fe 100644
--- a/include/grub/i386/bsd.h
+++ b/include/grub/i386/bsd.h
@@ -254,8 +254,6 @@ struct grub_netbsd_btinfo_bootdisk
   int partition;
 };
 
-void grub_unix_real_boot (grub_addr_t entry, ...)
-     __attribute__ ((cdecl,noreturn));
 grub_err_t grub_freebsd_load_elfmodule32 (struct grub_relocator *relocator,
 					  grub_file_t file, int argc,
 					  char *argv[], grub_addr_t *kern_end);