diff --git a/lib/core/settings.py b/lib/core/settings.py
index c13cbd212..e10a188b4 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -43,7 +43,7 @@ URI_QUESTION_MARKER = "__QUESTION_MARK__"
 ASTERISK_MARKER = "__ASTERISK_MARK__"
 REPLACEMENT_MARKER = "__REPLACEMENT_MARK__"
 
-PAYLOAD_DELIMITER = "\x00\x00\x00"
+PAYLOAD_DELIMITER = "__PAYLOAD_DELIMITER__"
 CHAR_INFERENCE_MARK = "%c"
 PRINTABLE_CHAR_REGEX = r"[^\x00-\x1f\x7f-\xff]"