Index: head/contrib/mdocml/mdoc.7
===================================================================
--- head/contrib/mdocml/mdoc.7
+++ head/contrib/mdocml/mdoc.7
@@ -2575,6 +2575,17 @@
 .br
 This standard is also called
 X/Open Portability Guide version 7.
+.Pp
+.It \-p1003.1-2013
+.St -p1003.1-2013
+.br
+The 2013 edition incorporates Technical Corrigendum 1.
+.Pp
+.It \-p1003.1-2016
+.St -p1003.1-2016
+.br
+The 2016 edition incorporates Technical Corrigendum 1 and
+Technical Corrigendum 2.
 .El
 .It Other standards
 .Pp
Index: head/contrib/mdocml/st.in
===================================================================
--- head/contrib/mdocml/st.in
+++ head/contrib/mdocml/st.in
@@ -35,6 +35,7 @@
 LINE("-p1003.1-2004",	"IEEE Std 1003.1-2004 (\\(LqPOSIX.1\\(Rq)")
 LINE("-p1003.1-2008",	"IEEE Std 1003.1-2008 (\\(LqPOSIX.1\\(Rq)")
 LINE("-p1003.1-2013",	"IEEE Std 1003.1-2008, 2013 Edition (\\(LqPOSIX.1\\(Rq)")
+LINE("-p1003.1-2016",	"IEEE Std 1003.1-2008, 2016 Edition (\\(LqPOSIX.1\\(Rq)")
 LINE("-p1003.1",	"IEEE Std 1003.1 (\\(LqPOSIX.1\\(Rq)")
 LINE("-p1003.1b",	"IEEE Std 1003.1b (\\(LqPOSIX.1b\\(Rq)")
 LINE("-p1003.1b-93",	"IEEE Std 1003.1b-1993 (\\(LqPOSIX.1b\\(Rq)")