diff -r 0f2e5303f212 -r f0a040f1de1b dialogs/DurationEditorDialog.py
--- a/dialogs/DurationEditorDialog.py	Tue Oct 09 11:43:39 2018 +0300
+++ b/dialogs/DurationEditorDialog.py	Tue Oct 09 11:56:45 2018 +0300
@@ -41,7 +41,7 @@
 HOUR = 60 * MINUTE
 DAY = 24 * HOUR
 
-IEC_TIME_MODEL = re.compile("(?:T|TIME)#(-)?(?:(%(float)s)D_?)?(?:(%(float)s)H_?)?(?:(%(float)s)M(?!S)_?)?(?:(%(float)s)S_?)?(?:(%(float)s)MS)?$" % {"float": "[0-9]+(?:\.[0-9]+)?"})
+IEC_TIME_MODEL = re.compile(r"(?:T|TIME)#(-)?(?:(%(float)s)D_?)?(?:(%(float)s)H_?)?(?:(%(float)s)M(?!S)_?)?(?:(%(float)s)S_?)?(?:(%(float)s)MS)?$" % {"float": r"[0-9]+(?:\.[0-9]+)?"})
 
 
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