diff --git a/subprojects/gst-plugins-good/docs/gst_plugins_cache.json b/subprojects/gst-plugins-good/docs/gst_plugins_cache.json
index 2adc3e9504..f80e9b1344 100644
--- a/subprojects/gst-plugins-good/docs/gst_plugins_cache.json
+++ b/subprojects/gst-plugins-good/docs/gst_plugins_cache.json
@@ -18443,7 +18443,7 @@
             "rtphdrextntp64": {
                 "RTP-Header-Extension-URI": "urn:ietf:params:rtp-hdrext:ntp-64",
                 "author": "Sebastian Dröge <sebastian@centricular.com>",
-                "description": "Extends RTP packets to add or retrieve a 64-bit NTP timestamp as specified in RFC6501",
+                "description": "Extends RTP packets to add or retrieve a 64-bit NTP timestamp as specified in RFC6051",
                 "hierarchy": [
                     "GstRTPHeaderExtensionNtp64",
                     "GstRTPHeaderExtension",
diff --git a/subprojects/gst-plugins-good/gst/rtpmanager/gstrtphdrext-ntp.c b/subprojects/gst-plugins-good/gst/rtpmanager/gstrtphdrext-ntp.c
index a027138d5b..2d514f2c7b 100644
--- a/subprojects/gst-plugins-good/gst/rtpmanager/gstrtphdrext-ntp.c
+++ b/subprojects/gst-plugins-good/gst/rtpmanager/gstrtphdrext-ntp.c
@@ -254,7 +254,7 @@ static void
       "RTP Header Extension RFC6051 64-bit NTP timestamp",
       GST_RTP_HDREXT_ELEMENT_CLASS,
       "Extends RTP packets to add or retrieve a 64-bit NTP "
-      "timestamp as specified in RFC6501",
+      "timestamp as specified in RFC6051",
       "Sebastian Dröge <sebastian@centricular.com>");
   gst_rtp_header_extension_class_set_uri (rtp_hdr_class,
       GST_RTP_HDREXT_BASE GST_RTP_HDREXT_NTP_64);