diff --git a/lib/libc/stdio/mktemp.3 b/lib/libc/stdio/mktemp.3
--- a/lib/libc/stdio/mktemp.3
+++ b/lib/libc/stdio/mktemp.3
@@ -275,7 +275,10 @@
 and is not specified by
 .St -p1003.1-2008 .
 The
-.Fn mkostemp ,
+.Fn mkostemp
+function conforms to
+.St -p1003.1-2024 .
+The
 .Fn mkstemps ,
 .Fn mkostemps
 and
diff --git a/lib/libc/stdio/printf.3 b/lib/libc/stdio/printf.3
--- a/lib/libc/stdio/printf.3
+++ b/lib/libc/stdio/printf.3
@@ -828,6 +828,12 @@
 .Fn vdprintf
 conform to
 .St -p1003.1-2008 .
+The functions
+.Fn asprintf
+and
+.Fn vasprintf
+conform to
+.St -p1003.1-2024 .
 .Sh HISTORY
 The functions
 .Fn asprintf
diff --git a/lib/libc/stdlib/getenv.3 b/lib/libc/stdlib/getenv.3
--- a/lib/libc/stdlib/getenv.3
+++ b/lib/libc/stdlib/getenv.3
@@ -218,7 +218,8 @@
 .St -p1003.1-2001 .
 The
 .Fn secure_getenv
-function is expected to be glibc-compatible.
+function conforms to
+.St -p1003.1-2024 .
 .Sh HISTORY
 The functions
 .Fn setenv
diff --git a/lib/libc/stdlib/reallocarray.3 b/lib/libc/stdlib/reallocarray.3
--- a/lib/libc/stdlib/reallocarray.3
+++ b/lib/libc/stdlib/reallocarray.3
@@ -131,6 +131,10 @@
 .Ed
 .Sh SEE ALSO
 .Xr realloc 3
+.Sh STANDARDS
+.Fn reallocarray
+conforms to
+.St -p1003.1-2024 .
 .Sh HISTORY
 The
 .Fn reallocarray
diff --git a/lib/libc/string/memmem.3 b/lib/libc/string/memmem.3
--- a/lib/libc/string/memmem.3
+++ b/lib/libc/string/memmem.3
@@ -67,10 +67,10 @@
 .Xr memchr 3 ,
 .Xr strchr 3 ,
 .Xr strstr 3
-.Sh CONFORMING TO
+.Sh STANDARDS
 .Fn memmem
-started as a GNU extension but is now available in at least
-the GNU, musl, bionic, OpenBSD, NetBSD, macOS, and illumos C runtime libraries.
+conforms to
+.St -p1003.1-2024 .
 .Sh HISTORY
 The
 .Fn memmem