diff --git a/lib/libefi/rdwr_efi.c b/lib/libefi/rdwr_efi.c
index fd243e230..6acfdc5e1 100644
--- a/lib/libefi/rdwr_efi.c
+++ b/lib/libefi/rdwr_efi.c
@@ -1564,6 +1564,7 @@ efi_type(int fd)
 	}
 	return (0);
 #else
+	(void) fd;
 	return (ENOSYS);
 #endif
 }