diff --git a/contrib/elftoolchain/readelf/readelf.1 b/contrib/elftoolchain/readelf/readelf.1
--- a/contrib/elftoolchain/readelf/readelf.1
+++ b/contrib/elftoolchain/readelf/readelf.1
@@ -24,7 +24,7 @@
 .\"
 .\" $Id: readelf.1 3753 2019-06-28 01:13:13Z emaste $
 .\"
-.Dd October 31, 2020
+.Dd September 17, 2021
 .Dt READELF 1
 .Os
 .Sh NAME
@@ -76,8 +76,10 @@
 .Fl h ,
 .Fl I ,
 .Fl l ,
+.Fl n ,
 .Fl r ,
 .Fl s ,
+.Fl u ,
 .Fl A ,
 .Fl S
 and
diff --git a/contrib/elftoolchain/readelf/readelf.c b/contrib/elftoolchain/readelf/readelf.c
--- a/contrib/elftoolchain/readelf/readelf.c
+++ b/contrib/elftoolchain/readelf/readelf.c
@@ -7788,7 +7788,7 @@
 			break;
 		case 'a':
 			re->options |= RE_AA | RE_D | RE_G | RE_H | RE_II |
-			    RE_L | RE_R | RE_SS | RE_S | RE_VV;
+			    RE_L | RE_N | RE_R | RE_SS | RE_S | RE_U | RE_VV;
 			break;
 		case 'c':
 			re->options |= RE_C;