diff --git a/core/Model/CalendarModel.vala b/core/Model/CalendarModel.vala
index 3e3b8cbd3..b6505c46d 100644
--- a/core/Model/CalendarModel.vala
+++ b/core/Model/CalendarModel.vala
@@ -68,7 +68,11 @@ public class Maya.Model.CalendarModel : Object {
     }
 
     private CalendarModel () {
+#if _NL_TIME_FIRST_WEEKDAY
         int week_start = Posix.NLTime.FIRST_WEEKDAY.to_string ().data[0];
+#else
+        int week_start = 0;
+#endif
         if (week_start >= 1 && week_start <= 7) {
             week_starts_on = (Maya.Settings.Weekday)week_start-1;
         }