diff --git a/update_i42_domain.py b/update_i42_domain.py
index e7fd8e58efa87ac38adeae866676d3206a6c9440..2d39b92580954b5dd5f8b67947ad46c7f067dd08 100755
--- a/update_i42_domain.py
+++ b/update_i42_domain.py
@@ -72,10 +72,11 @@ except NameError:
     logging.error("Token megadása kötelező")
     sys.exit()
 try:
-    if MY_PREFIX.split('.')[-2:] == ('i42','hu'):
-        MY_PREFIX = str(MY_PREFIX.split('.')[:-2])
+    if MY_PREFIX.split('.')[-2:] == ['i42','hu']:
+        MY_PREFIX = '.'.join(MY_PREFIX.split('.')[:-2])
 except NameError:
     logging.error("Prefix megadása kötelező.")
+    raise
     sys.exit()
 
 data_v6 = data_v4 = {"token" : MY_TOKEN, "prefix": MY_PREFIX}