diff --git a/share/man/man4/da.4 b/share/man/man4/da.4
index 7bb31d1283c2..66778d439f96 100644
--- a/share/man/man4/da.4
+++ b/share/man/man4/da.4
@@ -218,7 +218,7 @@ raw mode
 disk unit
 .Ar u ,
 slice
-.ar n ,
+.Ar n ,
 accessed as an unpartitioned device
 .It Pa /dev/da Ns Ar u Ns Ar p
 block mode