diff --git a/vllm/v1/core/kv_cache_utils.py b/vllm/v1/core/kv_cache_utils.py
index 12d6681ea6535..2b6557ad3ce66 100644
--- a/vllm/v1/core/kv_cache_utils.py
+++ b/vllm/v1/core/kv_cache_utils.py
@@ -262,9 +262,10 @@ def hash_block_tokens(
         The hash value of the block and the token ids in the block.
         The entire tuple is used as the hash key of the block.
     """
+    curr_block_token_ids_tuple = tuple(curr_block_token_ids)
     return BlockHashType(
-        hash((parent_block_hash, tuple(curr_block_token_ids), extra_keys)),
-        tuple(curr_block_token_ids), extra_keys)
+        hash((parent_block_hash, curr_block_token_ids_tuple, extra_keys)),
+        curr_block_token_ids_tuple, extra_keys)
 
 
 def hash_request_tokens(block_size: int,