diff --git a/vllm/distributed/kv_transfer/kv_connector/utils.py b/vllm/distributed/kv_transfer/kv_connector/utils.py
index f73431fd7b2f..b184f6574130 100644
--- a/vllm/distributed/kv_transfer/kv_connector/utils.py
+++ b/vllm/distributed/kv_transfer/kv_connector/utils.py
@@ -322,7 +322,7 @@ def __post_init__(self):
         # Figure out whether the first dimension of the cache is K/V
         # or num_blocks. This is used to register the memory regions correctly.
         kv_cache_shape = self.attn_backend.get_kv_cache_shape(
-            num_blocks=1, block_size=16, num_kv_heads=4, head_size=1
+            num_blocks=1, block_size=16, num_kv_heads=1, head_size=1
         )
         # Non-MLA backends caches have 5 dims [2, num_blocks, H,N,D],
         # we just mock num_blocks to 1 for the dimension check below.