diff --git a/rust/kernel/opp.rs b/rust/kernel/opp.rs
index 212555dacd45..c2bdc11f3999 100644
--- a/rust/kernel/opp.rs
+++ b/rust/kernel/opp.rs
@@ -582,6 +582,7 @@ impl<T: ConfigOps + Default> Config<T> {
 /// use kernel::opp::Table;
 /// use kernel::types::ARef;
 ///
+/// #[cfg(CONFIG_OF)]
 /// fn get_table(dev: &ARef<Device>, mask: &mut Cpumask, freq: Hertz) -> Result<Table> {
 ///     let mut opp_table = Table::from_of_cpumask(dev, mask)?;
 ///