diff --git a/alc/backends/wave.cpp b/alc/backends/wave.cpp
index 294a0d2d..3c8f9b8f 100644
--- a/alc/backends/wave.cpp
+++ b/alc/backends/wave.cpp
@@ -194,8 +194,8 @@ int WaveBackend::mixerProc()
         if(done >= mDevice->Frequency)
         {
             seconds s{done/mDevice->Frequency};
+            done %= mDevice->Frequency;
             start += s;
-            done -= mDevice->Frequency*s.count();
         }
     }