diff --git a/include/asm-generic/u-boot.h b/include/asm-generic/u-boot.h
index c918049..9f3351d 100644
--- a/include/asm-generic/u-boot.h
+++ b/include/asm-generic/u-boot.h
@@ -130,8 +130,8 @@
 	ulong	        bi_boot_params;	/* where this board expects params */
 #ifdef CONFIG_NR_DRAM_BANKS
 	struct {			/* RAM configuration */
-		ulong start;
-		ulong size;
+		phys_addr_t start;
+		phys_size_t size;
 	} bi_dram[CONFIG_NR_DRAM_BANKS];
 #endif /* CONFIG_NR_DRAM_BANKS */
 } bd_t;