diff --git a/libao2/ao_oss.c b/libao2/ao_oss.c
index 8e3f76285e..a98d5d1922 100644
--- a/libao2/ao_oss.c
+++ b/libao2/ao_oss.c
@@ -454,6 +454,8 @@ static void reset(void){
 #endif
 
   oss_format = format2oss(ao_data.format);
+  if(ao_data.format == AF_FORMAT_AC3)
+    ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_data.samplerate);
   ioctl (audio_fd, SNDCTL_DSP_SETFMT, &oss_format);
   if(ao_data.format != AF_FORMAT_AC3) {
     if (ao_data.channels > 2)