diff --git a/elements/centos7/root.d/10-centos7-cloud-image b/elements/centos7/root.d/10-centos7-cloud-image
index 041b3321..57a8c823 100755
--- a/elements/centos7/root.d/10-centos7-cloud-image
+++ b/elements/centos7/root.d/10-centos7-cloud-image
@@ -11,6 +11,9 @@ set -o pipefail
 
 if [ 'amd64' = "$ARCH" ] ; then
     ARCH="x86_64"
+else
+    echo 'centos7 root element only support the amd64 $ARCH value.'
+    exit 1
 fi
 
 DIB_LOCAL_IMAGE=${DIB_LOCAL_IMAGE:-}
diff --git a/elements/rhel7/root.d/10-rhel7-cloud-image b/elements/rhel7/root.d/10-rhel7-cloud-image
index e4fc1122..87c082ec 100755
--- a/elements/rhel7/root.d/10-rhel7-cloud-image
+++ b/elements/rhel7/root.d/10-rhel7-cloud-image
@@ -11,6 +11,9 @@ set -o pipefail
 
 if [ 'amd64' = "$ARCH" ] ; then
     ARCH="x86_64"
+else
+    echo 'rhel7 root element only support the amd64 $ARCH value.'
+    exit 1
 fi
 
 DIB_LOCAL_IMAGE=${DIB_LOCAL_IMAGE:-""}