diff --git a/include/dma.h b/include/dma.h
index 6ff5919..a64580a 100644
--- a/include/dma.h
+++ b/include/dma.h
@@ -13,6 +13,8 @@
 #include <linux/errno.h>
 #include <linux/types.h>
 
+struct udevice;
+
 /*
  * enum dma_direction - dma transfer direction indicator
  * @DMA_MEM_TO_MEM: Memcpy mode