diff --git a/rust/helpers/dma.c b/rust/helpers/dma.c
index 6e741c197242..8c7e8d7b888e 100644
--- a/rust/helpers/dma.c
+++ b/rust/helpers/dma.c
@@ -2,20 +2,23 @@
 
 #include <linux/dma-mapping.h>
 
-void *rust_helper_dma_alloc_attrs(struct device *dev, size_t size,
-				  dma_addr_t *dma_handle, gfp_t flag,
-				  unsigned long attrs)
+__rust_helper void *rust_helper_dma_alloc_attrs(struct device *dev, size_t size,
+						dma_addr_t *dma_handle,
+						gfp_t flag, unsigned long attrs)
 {
 	return dma_alloc_attrs(dev, size, dma_handle, flag, attrs);
 }
 
-void rust_helper_dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
-				dma_addr_t dma_handle, unsigned long attrs)
+__rust_helper void rust_helper_dma_free_attrs(struct device *dev, size_t size,
+					      void *cpu_addr,
+					      dma_addr_t dma_handle,
+					      unsigned long attrs)
 {
 	dma_free_attrs(dev, size, cpu_addr, dma_handle, attrs);
 }
 
-int rust_helper_dma_set_mask_and_coherent(struct device *dev, u64 mask)
+__rust_helper int rust_helper_dma_set_mask_and_coherent(struct device *dev,
+							u64 mask)
 {
 	return dma_set_mask_and_coherent(dev, mask);
 }