diff --git a/rust/bindings/lib.rs b/rust/bindings/lib.rs
index 812f8e5a08d5..c17e6c2b775f 100644
--- a/rust/bindings/lib.rs
+++ b/rust/bindings/lib.rs
@@ -81,3 +81,8 @@ mod bindings_helper {
         None
     }
 };
+
+// `bindgen` keeps the first definition of a macro and ignores a later `#undef`.
+// The generated `HZ` is therefore `__USER_HZ` from
+// `include/uapi/asm-generic/param.h`, not `CONFIG_HZ`.
+pub const HZ: u32 = CONFIG_HZ;