diff --git a/lib/menu-functions.sh b/lib/menu-functions.sh
index dc0558c..23a457d 100644
--- a/lib/menu-functions.sh
+++ b/lib/menu-functions.sh
@@ -20,7 +20,11 @@ set -eo pipefail
 # Bash version check
 if [ "${BASH_VERSINFO[0]}" -lt 4 ] || ([ "${BASH_VERSINFO[0]}" -eq 4 ] && [ "${BASH_VERSINFO[1]}" -lt 1 ]); then
     echo "[ERROR] menu-functions.sh requires Bash 4.1 or later (detected: ${BASH_VERSION})" >&2
-    return 1 2>/dev/null || exit 1
+    if [ "${BASH_SOURCE[0]}" = "${0}" ]; then
+        exit 1
+    else
+        return 1
+    fi
 fi
 
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