diff --git a/gguf-py/gguf/utility.py b/gguf-py/gguf/utility.py
index e5251aef8c832..00adcbc937398 100644
--- a/gguf-py/gguf/utility.py
+++ b/gguf-py/gguf/utility.py
@@ -231,7 +231,7 @@ def get_data_by_range(cls, url: str, start: int, size: int = -1) -> bytes:
         response.raise_for_status()
 
         # Get raw byte data
-        return response.content[:size]
+        return response.content[slice(size if size > -1 else None)]
 
     @classmethod
     def check_file_exist(cls, url: str) -> bool: