diff --git a/sed/calibrator/hextof.py b/sed/calibrator/hextof.py
index 9d9d5f11..bd93beef 100644
--- a/sed/calibrator/hextof.py
+++ b/sed/calibrator/hextof.py
@@ -156,7 +156,7 @@ def convert_to_ns(x):
 
 
 
-def calibrate_k(
+def calibrate_k_division_model(
         df: Union[pd.DataFrame, dask.dataframe.DataFrame],
         warp_params: Sequence[float] = None,
         x_column: str = "dldPosX",