diff --git a/libavformat/utils.c b/libavformat/utils.c
index 8e5ec48154..48882bed95 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -432,7 +432,7 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
                           const char *filename, void *logctx,
                           unsigned int offset, unsigned int max_probe_size)
 {
-    AVProbeData pd = { filename ? filename : "", NULL, -offset };
+    AVProbeData pd = { filename ? filename : "" };
     uint8_t *buf = NULL;
     uint8_t *mime_type;
     int ret = 0, probe_size, buf_offset = 0;