diff --git a/menu.c b/menu.c
index 14be0ed..9c6a0ff 100644
--- a/menu.c
+++ b/menu.c
@@ -1377,8 +1377,8 @@ void cMenuTimers::ActualiseDiskStatus(void)
// compute free disk space
int freeMB, freeMinutes, runshortMinutes;
- VideoDiskSpace(&freeMB);
- freeMinutes = int(double(freeMB) * 1.1 / MB_PER_MINUTE); // overestimate by 10 percent
+ cVideoDirectory::VideoDiskSpace(&freeMB);
+ freeMinutes = int(double(freeMB) * 1.1 / 25.75); // overestimate by 10 percent
runshortMinutes = freeMinutes / 5; // 20 Percent
// fill entries list