diff --git a/LossFunctions.py b/LossFunctions.py
index 9f7fa4548c9c04f566bc07d7cfa8ca58acbc2b5c..b0574a8342829ee056bea5e2582dce0bd29ada0c 100644
--- a/LossFunctions.py
+++ b/LossFunctions.py
@@ -36,7 +36,7 @@ class BinnedLH:
         
         E = y_hat*self.dx
         h = self.counts
-        mask = self.mask
+        mask = self.mask & (y_hat>self.eps)
         
 
         nlogL= np.zeros(self.len_x)