--- /usr/bin/xfce4-screensaver-configure	2019-08-25 18:51:46.000000000 +0300
+++ xfce4-screensaver-configure	2020-01-08 19:36:16.006814995 +0200
@@ -80,7 +80,7 @@
         return self._set_property("bool", prop, value)
 
     def get_double(self, prop, default):
-        return float(self._get_property(prop, default))
+        return locale.atof(self._get_property(prop, default))
 
     def set_double(self, prop, value):
         return self._set_property("double", prop, value)