diff --git a/0-setup-linux.sh b/0-setup-linux.sh
index 068a613..4bfa77a 100755
--- a/0-setup-linux.sh
+++ b/0-setup-linux.sh
@@ -48,7 +48,7 @@ source /etc/os-release
 OS_ID="${ID,,}"
 OS_LIKE="${ID_LIKE:-}"
 OS_LIKE="${OS_LIKE,,}"
-OS_VERSION="$VERSION_ID"
+OS_VERSION="${VERSION_ID:-unknown}"
 OS_PRETTY="$PRETTY_NAME"
 OS=""