diff --git a/rust/helpers/platform.c b/rust/helpers/platform.c
index 1ce89c1a36f7..188b3240f32d 100644
--- a/rust/helpers/platform.c
+++ b/rust/helpers/platform.c
@@ -2,7 +2,7 @@
 
 #include <linux/platform_device.h>
 
-bool rust_helper_dev_is_platform(const struct device *dev)
+__rust_helper bool rust_helper_dev_is_platform(const struct device *dev)
 {
 	return dev_is_platform(dev);
 }