diff --git a/doc/draft-spittka-payload-rtp-opus.xml b/doc/draft-spittka-payload-rtp-opus.xml
index ee99bd66e48210c153ae16c67636f0efecc15a3e..4c40d52f7c6ae8ac2bc96bb98e39a6db59f64727 100644
--- a/doc/draft-spittka-payload-rtp-opus.xml
+++ b/doc/draft-spittka-payload-rtp-opus.xml
@@ -713,21 +713,22 @@
present, MUST be included in the "a=fmtp" attribute in the SDP,
expressed as a media type string in the form of a
semicolon-separated list of parameter=value pairs (e.g.,
- maxaveragebitrate=20000). They MUST NOT be specified in an "fmtp"
- source attribute parameter.</t>
+ maxaveragebitrate=20000). They MUST NOT be specified in an
+ SSRC-specific "fmtp" source-level attribute (as defined in
+ Section 6.3 of <xref target="RFC5576"/>).</t>
<t>The OPTIONAL media type parameters "sprop-maxcapturerate",
and "sprop-stereo" MAY be mapped to the "a=fmtp" SDP attribute by
copying them directly from the media type parameter string as part
of the semicolon-separated list of parameter=value pairs (e.g.,
sprop-stereo=1). These same OPTIONAL media type parameters MAY also
- be specified using an "fmtp" source attribute as described in
- Section 6.3 of <xref target="RFC5576"/>. They MAY be
- specified in both places, in which case the "fmtp" source attribute
- parameter overrides the one found on the "a=fmtp" line. The value
- of any parameter which is not specified in the "fmtp" source
- attribute parameter MUST be taken from the "a=fmtp" line, if it is
- present there.</t>
+ be specified using an SSRC-specific "fmtp" source-level attribute
+ as described in Section 6.3 of <xref target="RFC5576"/>.
+ They MAY be specified in both places, in which case the parameter
+ in the source-level attribute overrides the one found on the
+ "a=fmtp" line. The value of any parameter which is not specified in
+ a source-level source attribute MUST be taken from the "a=fmtp"
+ line, if it is present there.</t>
</list>
</t>