diff --git a/pytorch_toolbelt/losses/functional.py b/pytorch_toolbelt/losses/functional.py
index 1ef62f055..daae4a052 100644
--- a/pytorch_toolbelt/losses/functional.py
+++ b/pytorch_toolbelt/losses/functional.py
@@ -70,7 +70,7 @@ def focal_loss_with_logits(
     if reduced_threshold is None:
         focal_term = (1.0 - pt).pow(gamma)
     else:
-        focal_term = ((1.0 - pt) / reduced_threshold).pow(gamma)
+        focal_term = ((1.0 - pt) / (1 - reduced_threshold)).pow(gamma) #the focal term continuity breaks when reduced_threshold not equal to 0.5. At pt equal to reduced_threshold, the value of piecewise function of focal term should be 1 from both sides .
         focal_term = torch.masked_fill(focal_term, pt < reduced_threshold, 1)
 
     loss = focal_term * ce_loss