diff --git a/vsaa/funcs.py b/vsaa/funcs.py
index 8c1dca9..bf0cae5 100644
--- a/vsaa/funcs.py
+++ b/vsaa/funcs.py
@@ -9,8 +9,8 @@
 from vsmasktools import EdgeDetect, EdgeDetectT, Prewitt, ScharrTCanny
 from vsrgtools import MeanMode, RepairMode, bilateral, box_blur, contrasharpening_median, repair, unsharp_masked
 from vstools import (
-    MISSING, CustomRuntimeError, CustomValueError, FormatsMismatchError, FunctionUtil, KwargsT, MissingT, PlanesT,
-    VSFunction, get_h, get_peak_value, get_w, get_y, join, normalize_planes, plane, scale_8bit, scale_value, split, vs
+    MISSING, ColorRange, CustomRuntimeError, CustomValueError, FormatsMismatchError, FunctionUtil, KwargsT, MissingT,
+    PlanesT, VSFunction, get_h, get_peak_value, get_w, get_y, join, normalize_planes, plane, scale_value, split, vs
 )
 
 from .abstract import Antialiaser, SingleRater
@@ -423,7 +423,7 @@ def based_aa(
         if mask and not isinstance(mask, vs.VideoNode):
             mask = EdgeDetect.ensure_obj(mask, based_aa)
             mask = mask.edgemask(plane(func.work_clip, 0))
-            mask = mask.std.Binarize(scale_8bit(func.work_clip, min(mask_thr, 255)))
+            mask = mask.std.Binarize(scale_value(min(mask_thr, 255), 8, func.work_clip, ColorRange.FULL))
             mask = box_blur(mask.std.Maximum()).std.Limiter()
 
         if show_mask: