diff --git a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
index 7f5d440297..ed2f844519 100644
--- a/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
+++ b/subprojects/gst-plugins-good/gst/isomp4/qtdemux.c
@@ -15073,6 +15073,7 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak, guint32 * mvhd_matrix)
             goto corrupt_file;
           }
 
+          gst_caps_unref (entry->caps);
           entry->caps = gst_codec_utils_opus_create_caps (rate, n_channels,
               channel_mapping_family, stream_count, coupled_count,
               channel_mapping);