diff -r f41dc3829af6 -r cded8d8a0485 targets/typemapping.py
--- a/targets/typemapping.py	Fri Jan 12 17:56:48 2018 +0300
+++ b/targets/typemapping.py	Fri Jan 12 18:33:54 2018 +0300
@@ -54,7 +54,7 @@
 
 def _ttime():
     return (IEC_TIME,
-            lambda x: td(0, x.s, x.ns/1000),
+            lambda x: td(0, x.s, x.ns/1000.0),
             lambda t, x: t(x.days * 24 * 3600 + x.seconds, x.microseconds*1000))