diff --git a/vllm/config.py b/vllm/config.py
index 6403a53f..92fde449 100644
--- a/vllm/config.py
+++ b/vllm/config.py
@@ -282,6 +282,10 @@ class ModelConfig:
             raise ValueError(
                 "BitAndBytes quantization with TP or PP is not supported yet.")
 
+        if self.quantization == "bitsandbytes" and self.enforce_eager is False:
+            raise ValueError(
+                "BitAndBytes with enforce_eager = False is not supported yet.")
+
     def get_hf_config_sliding_window(self) -> Optional[int]:
         """Get the sliding window size, or None if disabled."""