diff --git a/rust/helpers/usb.c b/rust/helpers/usb.c
index fb2aad0cbf4d..eff1cf7be3c2 100644
--- a/rust/helpers/usb.c
+++ b/rust/helpers/usb.c
@@ -2,7 +2,8 @@
 
 #include <linux/usb.h>
 
-struct usb_device *rust_helper_interface_to_usbdev(struct usb_interface *intf)
+__rust_helper struct usb_device *
+rust_helper_interface_to_usbdev(struct usb_interface *intf)
 {
 	return interface_to_usbdev(intf);
 }