diff --git a/include/dm/simple_bus.h b/include/dm/simple_bus.h
index 4ad4cc4..b710401 100644
--- a/include/dm/simple_bus.h
+++ b/include/dm/simple_bus.h
@@ -7,9 +7,9 @@
 #define __DM_SIMPLE_BUS_H
 
 struct simple_bus_plat {
-	u32 base;
-	u32 size;
-	u32 target;
+	fdt_addr_t base;
+	fdt_size_t size;
+	fdt_addr_t target;
 };
 
 #endif