diff --git a/src/lib/util/kformatprivate.cpp b/src/lib/util/kformatprivate.cpp
--- a/src/lib/util/kformatprivate.cpp
+++ b/src/lib/util/kformatprivate.cpp
@@ -336,11 +336,11 @@
         ms = qRound64(ms / (qreal)MSecsInSecond) * MSecsInSecond ;
     }
 
-    int hours = ms / MSecsInHour;
+    const qint64 hours = ms / MSecsInHour;
     ms = ms % MSecsInHour;
-    int minutes = ms / MSecsInMinute;
+    const int minutes = ms / MSecsInMinute;
     ms = ms % MSecsInMinute;
-    int seconds = ms / MSecsInSecond;
+    const int seconds = ms / MSecsInSecond;
     ms = ms % MSecsInSecond;
 
     if ((options & KFormat::InitialDuration) == KFormat::InitialDuration) {