From 1dce629c038b88a26d02ddc9d5e7f047933581ee Mon Sep 17 00:00:00 2001
From: Sergey Fedoseev <fedoseev.sergey@gmail.com>
Date: Thu, 11 Jan 2018 17:02:46 +0500
Subject: [PATCH] Refs #29006 -- Simplified handling of SNaN values in
 DecimalField.validate().

---
 django/forms/fields.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/django/forms/fields.py b/django/forms/fields.py
index f161c9ed17..ad94ea4740 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -351,7 +351,7 @@ class DecimalField(IntegerField):
         super().validate(value)
         if value in self.empty_values:
             return
-        if value.is_nan() or not math.isfinite(value):
+        if not value.is_finite():
             raise ValidationError(self.error_messages['invalid'], code='invalid')
 
     def widget_attrs(self, widget):