diff --git a/libavcodec/mpegaudioenc.c b/libavcodec/mpegaudioenc.c
index a940c0d689..3a5cdca38a 100644
--- a/libavcodec/mpegaudioenc.c
+++ b/libavcodec/mpegaudioenc.c
@@ -743,7 +743,8 @@ static int MPA_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
 }
 
 static const AVCodecDefault mp2_defaults[] = {
-    { "b",    "128k" },
+    { "b", "384000" },
+    { "ar", "48000" },
     { NULL },
 };