diff --git a/wheel/python/chia_rs/sized_byte_class.py b/wheel/python/chia_rs/sized_byte_class.py
index d81d5449..a73025c0 100644
--- a/wheel/python/chia_rs/sized_byte_class.py
+++ b/wheel/python/chia_rs/sized_byte_class.py
@@ -90,7 +90,7 @@ def fill(cls: Type[_T_SizedBytes], blob: bytes, fill: bytes, align: Literal["<",
 
         div, mod = divmod(cls._size - len(blob), fill_length)
         if mod != 0:
-            raise ValueError("invalid fill value, range to be filled must be multiple of fil size")
+            raise ValueError("invalid fill value, range to be filled must be multiple of fill size")
 
         all_fill = fill * div
         if align == "<":