diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs
index 6b333560d9fb..eaaeb405093b 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs
@@ -262,7 +262,10 @@ s! {
 /// See the [usage guidelines](crate::#usage-guidelines) for details and use.
 pub const ELAST: c_int = 96;
 
+/// This symbols is prone to change across releases upstream.
+/// See the [usage guidelines](crate::#usage-guidelines) for details and use.
 pub const RAND_MAX: c_int = 0x7fff_fffd;
+
 pub const KI_NSPARE_PTR: usize = 6;
 pub const MINCORE_SUPER: c_int = 0x20;
 /// max length of devicename
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs
index 505e54b2d1e4..091351fb0751 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs
@@ -303,6 +303,8 @@ s! {
     }
 }
 
+/// This symbols is prone to change across releases upstream.
+/// See the [usage guidelines](crate::#usage-guidelines) for details and use.
 pub const RAND_MAX: c_int = 0x7fff_fffd;
 
 /// This symbols is prone to change across releases upstream.
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
index 731362a58e0b..ced4832f870c 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
@@ -316,6 +316,8 @@ s! {
     }
 }
 
+/// This symbols is prone to change across releases upstream.
+/// See the [usage guidelines](crate::#usage-guidelines) for details and use.
 pub const RAND_MAX: c_int = 0x7fff_ffff;
 
 /// This symbols is prone to change across releases upstream.
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs
index b61df3b1be17..a6c70d2f3b1f 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs
@@ -318,6 +318,8 @@ s! {
     }
 }
 
+/// This symbols is prone to change across releases upstream.
+/// See the [usage guidelines](crate::#usage-guidelines) for details and use.
 pub const RAND_MAX: c_int = 0x7fff_ffff;
 
 /// This symbols is prone to change across releases upstream.
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd15/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd15/mod.rs
index 7ea5c27eea34..f92c71649bcf 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd15/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd15/mod.rs
@@ -320,6 +320,8 @@ s! {
     }
 }
 
+/// This symbols is prone to change across releases upstream.
+/// See the [usage guidelines](crate::#usage-guidelines) for details and use.
 pub const RAND_MAX: c_int = 0x7fff_ffff;
 
 /// This symbols is prone to change across releases upstream.