diff --git a/ci-wheel.Dockerfile b/ci-wheel.Dockerfile
index ec3ec8c..1656fc8 100644
--- a/ci-wheel.Dockerfile
+++ b/ci-wheel.Dockerfile
@@ -1,6 +1,5 @@
 ARG CUDA_VER=11.8.0
 ARG LINUX_VER=ubuntu20.04
-ARG REAL_ARCH=x86_64
 
 ARG BASE_IMAGE=nvcr.io/nvidia/cuda:${CUDA_VER}-devel-${LINUX_VER}
 FROM ${BASE_IMAGE}
@@ -8,7 +7,7 @@ FROM ${BASE_IMAGE}
 ARG CUDA_VER
 ARG LINUX_VER
 ARG CPU_ARCH
-ARG REAL_ARCH
+ARG REAL_ARCH=x86_64
 ARG PYTHON_VER=3.9
 ARG MANYLINUX_VER
 ARG POLICY=${MANYLINUX_VER}