diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs
index 466b2a8fe569..b843f3445483 100644
--- a/rust/kernel/error.rs
+++ b/rust/kernel/error.rs
@@ -8,8 +8,16 @@ use alloc::collections::TryReserveError;
 
 /// Contains the C-compatible error codes.
 pub mod code {
-    /// Out of memory.
-    pub const ENOMEM: super::Error = super::Error(-(crate::bindings::ENOMEM as i32));
+    macro_rules! declare_err {
+        ($err:tt $(,)? $($doc:expr),+) => {
+            $(
+            #[doc = $doc]
+            )*
+            pub const $err: super::Error = super::Error(-(crate::bindings::$err as i32));
+        };
+    }
+
+    declare_err!(ENOMEM, "Out of memory.");
 }
 
 /// Generic integer kernel error.