diff --git a/vllm/model_executor/models/baichuan.py b/vllm/model_executor/models/baichuan.py
index a923ed36a9..39cb5a8b2c 100644
--- a/vllm/model_executor/models/baichuan.py
+++ b/vllm/model_executor/models/baichuan.py
@@ -350,6 +350,21 @@ class BaiChuanBaseForCausalLM(nn.Module, SupportsLoRA, SupportsPP):
     embedding_modules = {}
     embedding_padding_modules = []
 
+    # BitandBytes specific attributes
+    default_bitsandbytes_target_modules = [
+        ".W_pack.",
+        ".o_proj.",
+        ".down_proj.",
+        ".up_proj.",
+        ".gate_proj.",
+        ".up_proj.",
+    ]
+    bitsandbytes_stacked_params_mapping = {
+        # shard_name, weight_name, index
+        "gate_proj": ("gate_up_proj", 0),
+        "up_proj": ("gate_up_proj", 1),
+    }
+
     def __init__(
         self,
         *,