diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs
index 145f5c397009..6f1587a2524e 100644
--- a/rust/kernel/error.rs
+++ b/rust/kernel/error.rs
@@ -135,8 +135,11 @@ pub(crate) fn to_blk_status(self) -> bindings::blk_status_t {
     /// Returns the error encoded as a pointer.
     #[allow(dead_code)]
     pub(crate) fn to_ptr<T>(self) -> *mut T {
+        #[cfg_attr(target_pointer_width = "32", allow(clippy::useless_conversion))]
         // SAFETY: `self.0` is a valid error due to its invariant.
-        unsafe { bindings::ERR_PTR(self.0.into()) as *mut _ }
+        unsafe {
+            bindings::ERR_PTR(self.0.into()) as *mut _
+        }
     }
 
     /// Returns a string representing the error, if one exists.