diff --git a/libavformat/utils.c b/libavformat/utils.c
index 7065b2f004..64a0b04ea0 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -514,7 +514,6 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
     for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
         probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
         int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
-        int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
 
         if (probe_size < offset) {
             continue;
@@ -522,7 +521,7 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
 
         /* read probe data */
         buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
-        if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
+        if ((ret = avio_read(pb, buf + pd.buf_size, probe_size - pd.buf_size)) < 0) {
             /* fail if error was not end of file, otherwise, lower score */
             if (ret != AVERROR_EOF) {
                 av_free(buf);