diff --git a/doc/draft-ietf-codec-oggopus.xml b/doc/draft-ietf-codec-oggopus.xml
index 6f32906588b8c9906cb152b0f9cc90a29da4bcc2..9daf039ac520d55c86e1c17d94856a19e6ef135a 100644
--- a/doc/draft-ietf-codec-oggopus.xml
+++ b/doc/draft-ietf-codec-oggopus.xml
@@ -1516,7 +1516,7 @@ The authors agree to grant third parties the irrevocable right to copy, use,
   target="https://svn.xiph.org/trunk/vorbis/lib/lpc.c">
 <front>
   <title>Autocorrelation LPC coeff generation algorithm
-    (vorbis source code)</title>
+    (Vorbis source code)</title>
 <author initials="J." surname="Degener" fullname="Jutta Degener"/>
 <author initials="C." surname="Bormann" fullname="Carsten Bormann"/>
 <date month="November" year="1994"/>