diff --git a/unsloth/save.py b/unsloth/save.py
index 940feb40f9..f8f884a9d3 100644
--- a/unsloth/save.py
+++ b/unsloth/save.py
@@ -853,9 +853,13 @@ def save_to_gguf(
     model_dtype = "f16" if model_dtype == "float16" else "bf16"
 
     # Convert quantization_method to list
-    quantization_method = \
-        quantization_method if type(quantization_method) is list else list(quantization_method)
-
+    if   isinstance(quantization_method, list):  pass
+    elif isinstance(quantization_method, str):   quantization_method = [ quantization_method, ]
+    elif isinstance(quantization_method, tuple): quantization_method = list(quantization_method)
+    else:
+        raise TypeError("Unsloth: quantization_method can only be a string or a list of strings")
+    pass
+    
     # Check if bfloat16 is supported
     if model_dtype == "bf16" and not torch.cuda.is_bf16_supported():
         logger.warning(