diff --git a/Lib/json/encoder.py b/Lib/json/encoder.py
index 4b214eb60e8..75b7f494b3f 100644
--- a/Lib/json/encoder.py
+++ b/Lib/json/encoder.py
@@ -27,8 +27,7 @@ for i in range(0x20):
     ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i))
     #ESCAPE_DCT.setdefault(chr(i), '\\u%04x' % (i,))
 
-# Assume this produces an infinity on all machines (probably not guaranteed)
-INFINITY = float('1e66666')
+INFINITY = float('inf')
 FLOAT_REPR = repr
 
 def encode_basestring(s):
diff --git a/Misc/NEWS b/Misc/NEWS
index ae4f7aab809..eaa9014e96d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -42,6 +42,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #14875: Use float('inf') instead of float('1e66666') in the json module.
+
 - Issue #13585: Added contextlib.ExitStack
 
 - PEP 3144, Issue #14814: Added the ipaddress module