From 3db8df8ffafe5bcd83a12b92bc4c8287cd80237f Mon Sep 17 00:00:00 2001
From: "A. Unique TensorFlower" <gardener@tensorflow.org>
Date: Mon, 27 Apr 2020 12:58:38 -0700
Subject: [PATCH] Fixes:GitHub Issue #38640

PiperOrigin-RevId: 308680785
Change-Id: Ic9e1d90dffacc90cd929de125e2832ce83e5d47f
---
 tensorflow/python/keras/layers/advanced_activations.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tensorflow/python/keras/layers/advanced_activations.py b/tensorflow/python/keras/layers/advanced_activations.py
index cc46ed0d64b..7cb40c172b7 100644
--- a/tensorflow/python/keras/layers/advanced_activations.py
+++ b/tensorflow/python/keras/layers/advanced_activations.py
@@ -349,6 +349,9 @@ class ReLU(Layer):
     if negative_slope < 0.:
       raise ValueError('negative_slope of Relu layer '
                        'cannot be negative value: ' + str(negative_slope))
+    if threshold is None:
+      raise ValueError('threshold of Relu layer '
+                       'cannot be None. Required a float')
 
     self.support_masking = True
     if max_value is not None: