diff --git a/main.py b/main.py
index 2358319..351afef 100644
--- a/main.py
+++ b/main.py
@@ -25,9 +25,8 @@ def main(address, password):
 
 
 if __name__ == "__main__":
-    try:
-        password = os.environ["FRITZ_PASSWORD"]
-    except KeyError:
+    password = os.environ["FRITZ_PASSWORD"]
+    if password is None or password == "":
         print("Error: FRITZ_PASSWORD environment variable not set.")
         exit(1)