diff --git a/libavcodec/libspeexdec.c b/libavcodec/libspeexdec.c
index 53e06d9b9e..5e149a5d5c 100644
--- a/libavcodec/libspeexdec.c
+++ b/libavcodec/libspeexdec.c
@@ -43,7 +43,6 @@ static av_cold int libspeex_decode_init(AVCodecContext *avctx)
     SpeexHeader *header = NULL;
     int spx_mode;
 
-    avctx->sample_fmt = AV_SAMPLE_FMT_NONE;
     if (avctx->extradata && avctx->extradata_size >= 80) {
         header = speex_packet_to_header(avctx->extradata,
                                         avctx->extradata_size);