diff --git a/doc/bird.sgml b/doc/bird.sgml
index 6680c1ef..92db2921 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -601,7 +601,7 @@ defined by using the <cf>defined( <m>attribute</m> )</cf> operator.
 	Next hop packets routed using this route should be forwarded to.
 
 	<tag><m/enum/ source</tag>
-	what protocol has told me about this route. Possible values: <cf/RTS_DUMMY/, <cf/RTS_STATIC/, <cf/RTS_INHERIT/, <cf/RTS_DEVICE/, <cf/RTS_STATIC_DEVICE/, <cf/RTS_REDIRECT/, <cf/RTS_RIP/, <cf/RTS_OSPF/, <cf/RTS_OSPF_EXT/, <cf/RTS_OSPF_IA/, <cf/RTS_OSPF_BOUNDARY/, <cf/RTS_BGP/, <cf/RTS_PIPE/.
+	what protocol has told me about this route. Possible values: <cf/RTS_DUMMY/, <cf/RTS_STATIC/, <cf/RTS_INHERIT/, <cf/RTS_DEVICE/, <cf/RTS_STATIC_DEVICE/, <cf/RTS_REDIRECT/, <cf/RTS_RIP/, <cf/RTS_OSPF/, <cf/RTS_OSPF_IA/, <cf/RTS_OSPF_EXT/, <cf/RTS_BGP/, <cf/RTS_PIPE/.
 
 	<tag><m/enum/ cast</tag>
 	Route type (<cf/RTC_UNICAST/ for normal routes, <cf/RTC_BROADCAST/, <cf/RTC_MULTICAST/, <cf/RTC_ANYCAST/ for broadcast, multicast and anycast routes). Read-only.