diff --git a/src/corelib/time/qgregoriancalendar.cpp b/src/corelib/time/qgregoriancalendar.cpp
index ca3c19b85c..d8e39786fa 100644
--- a/src/corelib/time/qgregoriancalendar.cpp
+++ b/src/corelib/time/qgregoriancalendar.cpp
@@ -144,7 +144,7 @@ int QGregorianCalendar::yearStartWeekDay(int year)
 {
     // Equivalent to weekDayOfJulian(julianForParts({year, 1, 1})
     const int y = year - (year < 0 ? 800 : 801);
-    return (y + qDiv(y, 4) - qDiv(y, 100) + qDiv(y, 400)) % 7 + 1;
+    return qMod(y + qDiv(y, 4) - qDiv(y, 100) + qDiv(y, 400), 7) + 1;
 }
 
 QCalendar::YearMonthDay QGregorianCalendar::julianDayToDate(qint64 jd) const