diff --git a/ext/dash/gstisoff.c b/ext/dash/gstisoff.c
index e67b11ae83..3c303931b7 100644
--- a/ext/dash/gstisoff.c
+++ b/ext/dash/gstisoff.c
@@ -116,7 +116,7 @@ gst_isoff_sidx_parser_add_buffer (GstSidxParser * parser, GstBuffer * buffer,
       if (parser->sidx.version == 0) {
         parser->sidx.earliest_pts =
             gst_byte_reader_get_uint32_be_unchecked (&reader);
-        parser->sidx.first_offset = parser->sidx.earliest_pts =
+        parser->sidx.first_offset =
             gst_byte_reader_get_uint32_be_unchecked (&reader);
       } else {
         parser->sidx.earliest_pts =