diff --git a/man2/sigaction.2 b/man2/sigaction.2
index d6e280844..f98a86bb5 100644
--- a/man2/sigaction.2
+++ b/man2/sigaction.2
@@ -515,8 +515,8 @@ Sent by the kernel.
 .B SI_TIMER
 POSIX timer expired
 .TP
-.B SI_MESGQ
-POSIX message queue state changed (since Linux 2.6.6); see
+.BR SI_MESGQ " (since Linux 2.6.6)"
+POSIX message queue state changed; see
 .BR mq_notify (3)
 .TP
 .B SI_ASYNCIO
@@ -531,11 +531,10 @@ fills in
 .I si_code
 as described below).
 .TP
-.B SI_TKILL
+.BR SI_TKILL " (since Linux 2.4.19)"
 .BR tkill (2)
 or
 .BR tgkill (2)
-(since Linux 2.4.19)
 .\" SI_DETHREAD is defined in 2.6.9 sources, but isn't implemented
 .\" It appears to have been an idea that was tried during 2.5.6
 .\" through to 2.5.24 and then was backed out.
@@ -684,8 +683,8 @@ traced child has trapped
 .B CLD_STOPPED
 child has stopped
 .TP
-.B CLD_CONTINUED
-stopped child has continued (since Linux 2.6.9)
+.BR CLD_CONTINUED " (since Linux 2.6.9)"
+stopped child has continued
 .RE
 .PP
 The following values can be placed in