diff --git a/man/strtoi.3bsd b/man/strtoi.3bsd
index 62c441e..00d9651 100644
--- a/man/strtoi.3bsd
+++ b/man/strtoi.3bsd
@@ -229,7 +229,7 @@ extension.
 The
 .Fn strtoi
 function first appeared in
-.Nx 7 .
+.Nx 7.0 .
 .Ox
 introduced the
 .Fn strtonum 3bsd
diff --git a/man/strtonum.3bsd b/man/strtonum.3bsd
index e06347b..3154145 100644
--- a/man/strtonum.3bsd
+++ b/man/strtonum.3bsd
@@ -151,7 +151,7 @@ function first appeared in
 .Ox 3.6 .
 .Fn strtonum
 was redesigned in
-.Nx 8
+.Nx 8.0
 as
 .Fn strtoi 3bsd
 and
diff --git a/man/strtou.3bsd b/man/strtou.3bsd
index 6bdc284..e64d84e 100644
--- a/man/strtou.3bsd
+++ b/man/strtou.3bsd
@@ -229,7 +229,7 @@ extension.
 The
 .Fn strtou
 function first appeared in
-.Nx 7 .
+.Nx 7.0 .
 .Ox
 introduced the
 .Fn strtonum 3bsd