diff --git a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
index a67e5d3494..2535f8177f 100644
--- a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
+++ b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
@@ -4154,6 +4154,8 @@ qtdemux_parse_moof (GstQTDemux * qtdemux, const guint8 * buffer, guint length,
       /* iterate all siblings */
       trun_node = qtdemux_tree_get_sibling_by_type_full (trun_node, FOURCC_trun,
           &trun_data);
+      /* don't use tfdt for subsequent trun as it only refers to the first */
+      tfdt_node = NULL;
     }
 
     uuid_node = qtdemux_tree_get_child_by_type (traf_node, FOURCC_uuid);