Fix wave and null device calculations when the timer wraps

1 files changed, 1 insertions, 1 deletions

diff --git a/Alc/null.c b/Alc/null.c
index beabdc21..fd5cc85a 100644
--- a/Alc/null.c
+++ b/Alc/null.c
@@ -57,7 +57,7 @@ static ALuint NullProc(ALvoid *ptr)
         {
             /* Timer wrapped. Add the remainder of the cycle to the available
              * count and reset the number of samples done */
-            avail += 0xFFFFFFFFu*Device->Frequency/1000 - done;
+            avail += (ALuint64)0xFFFFFFFFu*Device->Frequency/1000 - done;
             done = 0;
         }
         if(avail-done < Device->UpdateSize)