diff --git a/libavcodec/flacdec.c b/libavcodec/flacdec.c
index 781b4fadf1..0ebc23d6cf 100644
--- a/libavcodec/flacdec.c
+++ b/libavcodec/flacdec.c
@@ -125,6 +125,10 @@ static av_cold int flac_decode_init(AVCodecContext *avctx)
 
     /* initialize based on the demuxer-supplied streamdata header */
     ff_flac_parse_streaminfo(avctx, (FLACStreaminfo *)s, streaminfo);
+    if (s->bps > 16)
+        avctx->sample_fmt = SAMPLE_FMT_S32;
+    else
+        avctx->sample_fmt = SAMPLE_FMT_S16;
     allocate_buffers(s);
     s->got_streaminfo = 1;
 
@@ -186,10 +190,6 @@ void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
     avctx->channels = s->channels;
     avctx->sample_rate = s->samplerate;
     avctx->bits_per_raw_sample = s->bps;
-    if (s->bps > 16)
-        avctx->sample_fmt = SAMPLE_FMT_S32;
-    else
-        avctx->sample_fmt = SAMPLE_FMT_S16;
 
     s->samples  = get_bits_long(&gb, 32) << 4;
     s->samples |= get_bits(&gb, 4);