diff --git a/tokio/src/macros/select.rs b/tokio/src/macros/select.rs
index 31c9b3ac2e5..8e2aba90af9 100644
--- a/tokio/src/macros/select.rs
+++ b/tokio/src/macros/select.rs
@@ -449,6 +449,7 @@ macro_rules! select {
         use $crate::macros::support::Pin;
         use $crate::macros::support::Poll::{Ready, Pending};
 
+        #[doc(hidden)]
         const BRANCHES: u32 = $crate::count!( $($count)* );
 
         let mut disabled: __tokio_select_util::Mask = Default::default();