diff --git a/docs/source/user_guide/configuration/additional_config.md b/docs/source/user_guide/configuration/additional_config.md
index d388b837..f0a7a8dd 100644
--- a/docs/source/user_guide/configuration/additional_config.md
+++ b/docs/source/user_guide/configuration/additional_config.md
@@ -44,6 +44,7 @@ The following table lists additional configuration options available in vLLM Asc
 | `pa_shape_list`                     | list | `[]`    | The custom shape list of page attention ops.                                                              |
 | `enable_kv_nz`                      | bool | `False` | Whether to enable KV cache NZ layout. This option only takes effects on models using MLA (e.g., DeepSeek).                                      |
 | `layer_sharding` | dict | `{}` | Configuration options for Layer Sharding Linear |
+| `enable_sparse_c8` | bool | `False` | Whether to enable KV cache C8 in DSA models (e.g., DeepSeekV3.2 and GLM5). Not supported on A5 devices now |
 
 The details of each configuration option are as follows: