diff --git a/libavformat/tee.c b/libavformat/tee.c
index ef3b113a47..89a4ceb280 100644
--- a/libavformat/tee.c
+++ b/libavformat/tee.c
@@ -236,6 +236,7 @@ static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
     avf2->io_close = avf->io_close;
     avf2->interrupt_callback = avf->interrupt_callback;
     avf2->flags = avf->flags;
+    avf2->strict_std_compliance = avf->strict_std_compliance;
 
     tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
     if (!tee_slave->stream_map) {