diff --git a/av/av.go b/av/av.go
index 8487280..950fe91 100644
--- a/av/av.go
+++ b/av/av.go
@@ -269,8 +269,8 @@ type AudioEncoder interface {
 	SetSampleRate(int) (error)
 	SetChannelLayout(ChannelLayout) (error)
 	SetSampleFormat(SampleFormat) (error)
-	SetOption(string,interface{}) (error)
 	SetBitrate(int) (error)
+	SetOption(string,interface{}) (error)
 	GetOption(string,interface{}) (error)
 }