diff --git a/listener.py b/listener.py
index ea1e284..718b6c5 100755
--- a/listener.py
+++ b/listener.py
@@ -6,9 +6,15 @@ from collections import defaultdict
 from scapy.all import sniff, Dot11, RadioTap
 from dotenv import dotenv_values
 
-# === Load ENV ===
-config = dotenv_values(os.path.expanduser("~/wifi_test/settings.env"))
+settings_path = os.path.expanduser("~/wifi_test/settings.env")
+config = dotenv_values(settings_path)
+
+if not config:
+    print(f"[!] Failed to load settings from {settings_path}")
+    exit(1)
+
 LISTEN_INTERFACE = config.get("LISTEN_INTERFACE", "wlan0")
+print(f"[+] Using LISTEN_INTERFACE = {LISTEN_INTERFACE}")
 
 # === Globals ===
 clients_per_channel = defaultdict(set)