diff --git a/reply.py b/reply.py
index 201d356..13b72b8 100755
--- a/reply.py
+++ b/reply.py
@@ -51,7 +51,7 @@ class ReplyBot:
 
 		return False
 
-	def check_thread_length(self, xontext) -> bool:
+	def check_thread_length(self, context) -> bool:
 		"""return whether the thread is too long to reply to"""
 		posts = 0
 		for post in context['ancestors']: