diff --git a/vllm/config.py b/vllm/config.py
index 3b39573fc7db..ee9307e9405e 100644
--- a/vllm/config.py
+++ b/vllm/config.py
@@ -2679,6 +2679,8 @@ def verify_lora_support(self):
 @config
 @dataclass
 class PromptAdapterConfig:
+    """Configuration for PromptAdapters."""
+
     max_prompt_adapters: int = 1
     """Max number of PromptAdapters in a batch."""
     max_prompt_adapter_token: int = 0