diff --git a/src/llmtuner/extras/misc.py b/src/llmtuner/extras/misc.py
index 6998b76e12..cd2ff5bc29 100644
--- a/src/llmtuner/extras/misc.py
+++ b/src/llmtuner/extras/misc.py
@@ -81,7 +81,11 @@ def count_parameters(model: torch.nn.Module) -> Tuple[int, int]:
 
         # Due to the design of 4bit linear layers from bitsandbytes, multiply the number of parameters by 2
         if param.__class__.__name__ == "Params4bit":
-            num_bytes = param.quant_storage.itemsize if hasattr(param, "quant_storage") else 1
+            if hasattr(param, "quant_storage") and hasattr(param.quant_storage, "itemsize"):
+                num_bytes = param.quant_storage.itemsize
+            else:
+                num_bytes = 1
+
             num_params = num_params * 2 * num_bytes
 
         all_param += num_params