diff --git a/images/Dockerfile.alpine b/images/Dockerfile.alpine
index 53875236c..63f21a915 100644
--- a/images/Dockerfile.alpine
+++ b/images/Dockerfile.alpine
@@ -89,7 +89,8 @@ RUN apk --no-cache add  \
 ####                    Common to a Model                  ####
 ###############################################################
 FROM common AS generic
-RUN if [ "${TARGETARCH}" = "amd64" ];then apk --no-cache add grub-bios; fi
+ARG TARGETARCH
+RUN if [ "${TARGETARCH}" == "amd64" ];then apk --no-cache add grub-bios; fi
 RUN apk --no-cache add  \
       bonding \
       bridge \