diff --git a/OCI/Dockerfile b/OCI/Dockerfile
index e59791d..b30de9b 100644
--- a/OCI/Dockerfile
+++ b/OCI/Dockerfile
@@ -1,4 +1,5 @@
-FROM alpine
+ARG ARCH
+FROM $ARCH/alpine
 LABEL maintainer="Dominik Chilla <dominik@zwackl.de>"
 LABEL git_repo="https://github.com/chillout2k/exota-milter"
 
diff --git a/OCI/README.md b/OCI/README.md
index c905e45..08640ad 100644
--- a/OCI/README.md
+++ b/OCI/README.md
@@ -4,7 +4,7 @@ Actually I´m going with docker-ce to build the container image, but same result
 
 Run following command in the root directory of this repo:
 ```
-docker build -t exota-milter:local -f OCI/Dockerfile .
+docker build -t exota-milter:local --build-arg ARCH=amd64 -f OCI/Dockerfile .
 [...]
 Successfully built 9cceb121f604
 Successfully tagged exota-milter:local