diff --git a/kitty/fonts/box_drawing.py b/kitty/fonts/box_drawing.py
index fcf6c1ac4..f08647e56 100644
--- a/kitty/fonts/box_drawing.py
+++ b/kitty/fonts/box_drawing.py
@@ -890,7 +890,7 @@ box_chars: Dict[str, List[Callable]] = {
     '🬼': [p(smooth_mosaic, a=(0, 0.75), b=(0.5, 1))],
     '🬽': [p(smooth_mosaic, a=(0, 0.75), b=(1, 1))],
     '🬾': [p(smooth_mosaic, a=(0, 0.5), b=(0.5, 1))],
-    '🬿': [p(smooth_mosaic, a=(0, 0.5), b=(1, 1))],
+    '🬿': [p(smooth_mosaic, a=(0, 0.25), b=(1, 1))],
     '🭀': [p(smooth_mosaic, a=(0, 0), b=(0.5, 1))],
 
     '🭁': [p(smooth_mosaic, a=(0, 0.25), b=(0.5, 0))],