1 files changed, 5 insertions, 1 deletions
diff --git a/Alc/oss.c b/Alc/oss.c
index 8f2e6adc..c7f5421e 100644
--- a/Alc/oss.c
+++ b/Alc/oss.c
@@ -79,15 +79,19 @@ static ALuint OSSProc(ALvoid *ptr)
 {
     ALCdevice *pDevice = (ALCdevice*)ptr;
     oss_data *data = (oss_data*)pDevice->ExtraData;
+    ALint frameSize;
     int wrote;
 
+    frameSize = aluChannelsFromFormat(pDevice->Format) *
+                aluBytesFromFormat(pDevice->Format);
+
     while(!data->killNow && !pDevice->Connected)
     {
         ALint len = data->data_size;
         ALubyte *WritePtr = data->mix_data;
 
         SuspendContext(NULL);
-        aluMixData(pDevice->Context, WritePtr, len, pDevice->Format);
+        aluMixData(pDevice->Context, WritePtr, len/frameSize, pDevice->Format);
         ProcessContext(NULL);
 
         while(len > 0 && !data->killNow)