diff --git a/rpm/build_rpm_almalinux9.sh b/rpm/build_rpm_almalinux9.sh
index c458a12..3e663eb 100755
--- a/rpm/build_rpm_almalinux9.sh
+++ b/rpm/build_rpm_almalinux9.sh
@@ -8,7 +8,12 @@ set -e
 source ./cmdline.sh
 
 IMAGE=audiowaveform_rpm
-ARCH=x86_64
+
+if [ -z "${ARCH}" ]
+then
+    echo "Missing architecture (x86_64 or aarch64)"
+    exit 1
+fi
 
 set -x
 
diff --git a/rpm/build_rpm_amazon_linux_2.sh b/rpm/build_rpm_amazon_linux_2.sh
index ad6dc5b..f0f1478 100755
--- a/rpm/build_rpm_amazon_linux_2.sh
+++ b/rpm/build_rpm_amazon_linux_2.sh
@@ -9,7 +9,12 @@ source ./cmdline.sh
 
 IMAGE=audiowaveform_rpm
 AMAZON_RELEASE=2
-ARCH=x86_64
+
+if [ -z "${ARCH}" ]
+then
+    echo "Missing architecture (x86_64 or aarch64)"
+    exit 1
+fi
 
 set -x