diff --git a/rust/kernel/init.rs b/rust/kernel/init.rs
index 0fe043c0eaac..2d4b19b86857 100644
--- a/rust/kernel/init.rs
+++ b/rust/kernel/init.rs
@@ -788,7 +788,7 @@ pub unsafe trait PinInit<T: ?Sized, E = Infallible>: Sized {
     /// use kernel::{types::Opaque, init::pin_init_from_closure};
     /// #[repr(C)]
     /// struct RawFoo([u8; 16]);
-    /// extern {
+    /// extern "C" {
     ///     fn init_foo(_: *mut RawFoo);
     /// }
     ///