diff --git a/packaging/freebsd/package.sh b/packaging/freebsd/package.sh
index 30cb6fe9c..feb1fc406 100755
--- a/packaging/freebsd/package.sh
+++ b/packaging/freebsd/package.sh
@@ -28,7 +28,8 @@ done
 if [[ -n "${CARGO_BUILD_TARGET:-}" ]]; then
   case "$CARGO_BUILD_TARGET" in
     aarch64-unknown-freebsd) ARCH=aarch64 ;;
-    *) ARCH=x86_64 ;;
+    x86_64-unknown-freebsd) ARCH=x86_64 ;;
+    *) echo "unsupported CARGO_BUILD_TARGET $CARGO_BUILD_TARGET (expected x86_64-unknown-freebsd or aarch64-unknown-freebsd)" >&2; exit 2 ;;
   esac
 else
   ARCH="$(uname -m)"