diff --git a/cara/montecarlo.py b/cara/montecarlo.py
index b86b633b..d3326670 100644
--- a/cara/montecarlo.py
+++ b/cara/montecarlo.py
@@ -72,11 +72,11 @@ def mask_leak_out(d: float) -> float:
     if d < 0.5:
         return 1
 
-    if d < 1:
+    if d < 0.94614:
         return 1 - (0.5893 * d + 0.1546)
 
     if d < 3:
-        return 1 - (0.0509 * d + 0.0664)
+        return 1 - (0.0509 * d + 0.664)
 
     return 1 - 0.8167