diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
index 28d461d862bda1d042055c463613a1a87338b698..81f3a314dd76dfc6057ef9f7a82fff3b4d08c652 100644
--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -183,7 +183,7 @@ typedef union {
 struct map_info {
 	char *name;
 	unsigned long size;
-	unsigned long phys;
+	resource_size_t phys;
 #define NO_XIP (-1UL)
 
 	void __iomem *virt;