diff --git a/functions.py b/functions.py
index a87d35179d6f7c52d4ee49b1d0ba711af63af731..f19feeea6a0336a86ffe3bab04174799a5d99730 100644
--- a/functions.py
+++ b/functions.py
@@ -385,7 +385,7 @@ class ReLu(_Function):
         # TODO: Implement the derivative dx for this opetation and add the
         # result of the chain rule on self.dx.
         #######################################################################
-        is_sup = 0 if self.x.data <= 0 else 1
+        is_sup = self.x.data > 0
         self.dx = grad * is_sup
         #######################################################################
         # --------------------------- END OF YOUR CODE ------------------------