diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index ac8b2670de2af176b407cf90486278332d4204e6..8f379e9b8ca5710d3af1ec4f1c34d1e70892da0d 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -197,11 +197,6 @@ static int avi_write_header(AVFormatContext *s)
 
         stream = s->streams[i]->codec;
 
-        /* FourCC should really be set by the codec itself */
-        if (! stream->codec_tag) {
-            stream->codec_tag = codec_get_bmp_tag(stream->codec_id);
-        }
-
         /* stream generic header */
         strh = start_tag(pb, "strh");
         switch(stream->codec_type) {