diff --git a/serde_valid/src/lib.rs b/serde_valid/src/lib.rs
index 2dc55ce..b350a8d 100644
--- a/serde_valid/src/lib.rs
+++ b/serde_valid/src/lib.rs
@@ -685,7 +685,9 @@ where
 
 pub use serde_valid_derive::Validate;
 
+#[doc(hidden)]
 pub mod helpers {
+    /// This function is used to avoid [rustc(E0282)](https://doc.rust-lang.org/error_codes/E0282.html) error in `#[validate(custom)]` validator on the struct.
     pub fn wrap_closure_validation<T>(
         data: &T,
         f: impl FnOnce(&T) -> Result<(), crate::validation::Error>,