diff --git a/subprojects/gst-plugins-good/gst/rtp/gstrtpvp9pay.c b/subprojects/gst-plugins-good/gst/rtp/gstrtpvp9pay.c
index 153c56de41..f5db16b2cf 100644
--- a/subprojects/gst-plugins-good/gst/rtp/gstrtpvp9pay.c
+++ b/subprojects/gst-plugins-good/gst/rtp/gstrtpvp9pay.c
@@ -510,7 +510,8 @@ gst_rtp_vp9_create_header_buffer (GstRtpVP9Pay * self,
 
 static guint
 gst_rtp_vp9_payload_next (GstRtpVP9Pay * self, GstBufferList * list,
-    guint offset, GstBuffer * buffer, gsize buffer_size, gsize max_payload_len)
+    guint offset, GstBuffer * buffer, gsize buffer_size, gsize max_payload_len,
+    gboolean delta_unit)
 {
   GstBuffer *header;
   GstBuffer *sub;
@@ -532,6 +533,9 @@ gst_rtp_vp9_payload_next (GstRtpVP9Pay * self, GstBufferList * list,
 
   out = gst_buffer_append (header, sub);
 
+  if (delta_unit)
+    GST_BUFFER_FLAG_SET (out, GST_BUFFER_FLAG_DELTA_UNIT);
+
   gst_buffer_list_insert (list, -1, out);
 
   return available;
@@ -561,8 +565,10 @@ gst_rtp_vp9_pay_handle_buffer (GstRTPBasePayload * payload, GstBuffer * buffer)
   GstBufferList *list;
   gsize size, max_paylen;
   guint offset, mtu, vp9_hdr_len;
+  gboolean delta_unit;
 
   size = gst_buffer_get_size (buffer);
+  delta_unit = GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
 
   if (G_UNLIKELY (!gst_rtp_vp9_pay_parse_frame (self, buffer, size))) {
     GST_ELEMENT_ERROR (self, STREAM, ENCODE, (NULL),
@@ -579,7 +585,12 @@ gst_rtp_vp9_pay_handle_buffer (GstRTPBasePayload * payload, GstBuffer * buffer)
   offset = 0;
   while (offset < size) {
     offset +=
-        gst_rtp_vp9_payload_next (self, list, offset, buffer, size, max_paylen);
+        gst_rtp_vp9_payload_next (self, list, offset, buffer, size, max_paylen,
+        delta_unit);
+
+    /* only the first outgoing packet should not have the DELTA_UNIT flag */
+    if (!delta_unit)
+      delta_unit = TRUE;
   }
 
   ret = gst_rtp_base_payload_push_list (payload, list);
diff --git a/subprojects/gst-plugins-good/tests/check/elements/rtpvp9.c b/subprojects/gst-plugins-good/tests/check/elements/rtpvp9.c
index 2cbb261db0..f49c5bc4ec 100644
--- a/subprojects/gst-plugins-good/tests/check/elements/rtpvp9.c
+++ b/subprojects/gst-plugins-good/tests/check/elements/rtpvp9.c
@@ -439,11 +439,54 @@ GST_START_TEST (test_depay_svc_forgive_invalid_sid)
 
 GST_END_TEST;
 
+GST_START_TEST (test_pay_delta_unit_flag)
+{
+  guint8 vp9_bitstream_payload[] = {
+    0xa2, 0x49, 0x83, 0x42, 0x20, 0x00, 0x1e, 0x00,
+    0x1e, 0xc0, 0x07, 0x04, 0x83, 0x83, 0x08, 0x40,
+    0x00, 0x06, 0x60, 0x00, 0x00, 0x10, 0xbf, 0xff,
+    0x5a, 0x0f, 0xff, 0xff, 0xff, 0xfb, 0xc9, 0x83,
+    0xff, 0xff, 0xff, 0xff, 0x34, 0xca, 0x00
+  };
+
+  /* set mtu so that the buffer is split into multiple packets */
+  GstHarness *h = gst_harness_new_parse ("rtpvp9pay mtu=48");
+  GstFlowReturn ret;
+  GstBuffer *buffer;
+
+  gst_harness_set_src_caps_str (h, "video/x-vp9");
+
+  buffer = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY,
+      vp9_bitstream_payload, sizeof (vp9_bitstream_payload), 0,
+      sizeof (vp9_bitstream_payload), NULL, NULL);
+
+  ret = gst_harness_push (h, buffer);
+  fail_unless_equals_int (ret, GST_FLOW_OK);
+
+  /* the input buffer should be split into two buffers and pushed as a buffer
+   * list, only the first buffer of the first buffer list should be marked as a
+   * non-delta unit */
+  buffer = gst_harness_pull (h);
+  fail_unless (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT));
+  gst_buffer_unref (buffer);
+  buffer = gst_harness_pull (h);
+  fail_unless (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT));
+  gst_buffer_unref (buffer);
+
+  gst_harness_teardown (h);
+}
+
+GST_END_TEST;
+
 static Suite *
 rtpvp9_suite (void)
 {
   Suite *s = suite_create ("rtpvp9");
   TCase *tc_chain;
+
+  suite_add_tcase (s, (tc_chain = tcase_create ("vp9pay")));
+  tcase_add_test (tc_chain, test_pay_delta_unit_flag);
+
   suite_add_tcase (s, (tc_chain = tcase_create ("vp9depay")));
   tcase_add_test (tc_chain, test_depay_flexible_mode);
   tcase_add_test (tc_chain, test_depay_non_flexible_mode);