1 files changed, 2 insertions, 0 deletions
diff --git a/mdoc.7 b/mdoc.7
index c669d3f3..e10659da 100644
--- a/mdoc.7
+++ b/mdoc.7
@@ -2876,6 +2876,8 @@ The following standards are recognised:
 .St -ieee754
 .It \-iso8802-3
 .St -iso8802-3
+.It \-iso8601
+.St -iso8601
 .It \-ieee1275-94
 .St -ieee1275-94
 .It \-xpg3