diff --git a/doc/bird.sgml b/doc/bird.sgml
index b3ac38b0..b4e5d176 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -3511,16 +3511,6 @@ protocol ospf [v2|v3] <name> {
 	<m/dead/ seconds, it will consider the neighbor down. If both directives
 	<cf/dead count/ and <cf/dead/ are used, <cf/dead/ has precedence.
 
-	<tag><label id="ospf-secondary">secondary <M>switch</M></tag>
-	On BSD systems, older versions of BIRD supported OSPFv2 only for the
-	primary IP address of an interface, other IP ranges on the interface
-	were handled as stub networks. Since v1.4.1, regular operation on
-	secondary IP addresses is supported, but disabled by default for
-	compatibility. This option allows to enable it. The option is a
-	transitional measure, will be removed in the next major release as the
-	behavior will be changed. On Linux systems, the option is irrelevant, as
-	operation on non-primary addresses is already the regular behavior.
-
 	<tag><label id="ospf-rx-buffer">rx buffer <M>num</M></tag>
 	This option allows to specify the size of buffers used for packet
 	processing. The buffer size should be bigger than maximal size of any
diff --git a/proto/ospf/config.Y b/proto/ospf/config.Y
index b89584e1..2ec9babe 100644
--- a/proto/ospf/config.Y
+++ b/proto/ospf/config.Y
@@ -199,7 +199,7 @@ CF_KEYWORDS(ELIGIBLE, POLL, NETWORKS, HIDDEN, VIRTUAL, CHECK, LINK, ONLY, BFD)
 CF_KEYWORDS(RX, BUFFER, LARGE, NORMAL, STUBNET, HIDDEN, SUMMARY, TAG, EXTERNAL)
 CF_KEYWORDS(WAIT, DELAY, LSADB, ECMP, LIMIT, WEIGHT, NSSA, TRANSLATOR, STABILITY)
 CF_KEYWORDS(GLOBAL, LSID, ROUTER, SELF, INSTANCE, REAL, NETMASK, TX, PRIORITY, LENGTH)
-CF_KEYWORDS(SECONDARY, MERGE, LSA, SUPPRESSION, MULTICAST, RFC5838)
+CF_KEYWORDS(MERGE, LSA, SUPPRESSION, MULTICAST, RFC5838)
 
 %type <ld> lsadb_args
 %type <i> ospf_variant ospf_af_mc nbma_eligible