diff --git a/src/llmtuner/hparams/model_args.py b/src/llmtuner/hparams/model_args.py
index ac70bb3c..996eabae 100644
--- a/src/llmtuner/hparams/model_args.py
+++ b/src/llmtuner/hparams/model_args.py
@@ -85,6 +85,10 @@ class ModelArguments:
         default=False,
         metadata={"help": "Whethor or not to use multimodal LLM that accepts visual inputs."},
     )
+    autocast_projector: bool = field(
+        default=True,
+        metadata={"help": "Whethor or not to autocast projector."},
+    )
     moe_aux_loss_coef: Optional[float] = field(
         default=None,
         metadata={"help": "Coefficient of the auxiliary router loss in mixture-of-experts model."},
diff --git a/src/llmtuner/model/loader.py b/src/llmtuner/model/loader.py
index ead6178f..1dca84a1 100644
--- a/src/llmtuner/model/loader.py
+++ b/src/llmtuner/model/loader.py
@@ -155,7 +155,8 @@ def load_model(
         model.eval()
     else:
         model.train()
-
+        if model_args.visual_inputs:
+            model.vision_tower.requires_grad_(False)
     trainable_params, all_param = count_parameters(model)
     if is_trainable:
         param_stats = "trainable params: {:d} || all params: {:d} || trainable%: {:.4f}".format(
diff --git a/src/llmtuner/model/patcher.py b/src/llmtuner/model/patcher.py
index 31cba492..6ca6f2e5 100644
--- a/src/llmtuner/model/patcher.py
+++ b/src/llmtuner/model/patcher.py
@@ -101,7 +101,7 @@ def patch_model(
     if model_args.resize_vocab:
         resize_embedding_layer(model, tokenizer)
 
-    if model_args.visual_inputs:
+    if model_args.visual_inputs and model_args.autocast_projector:
         autocast_projector_dtype(model, model_args)
 
     if is_trainable: