diff --git a/cacheflow/block.py b/cacheflow/block.py
index 028fde0b4ac6a..c611d1080ebed 100644
--- a/cacheflow/block.py
+++ b/cacheflow/block.py
@@ -7,7 +7,7 @@ BLANK_TOKEN_ID = -1
 
 class LogicalTokenBlock:
 
-    def __int__(
+    def __init__(
         self,
         block_number: int,
         block_size: int,