diff --git a/include/asm-arm/arch-davinci/nand_defs.h b/include/asm-arm/arch-davinci/nand_defs.h
index ba75cd66c5..f2020728d6 100644
--- a/include/asm-arm/arch-davinci/nand_defs.h
+++ b/include/asm-arm/arch-davinci/nand_defs.h
@@ -28,8 +28,13 @@
 
 #include <asm/arch/hardware.h>
 
+#ifdef CONFIG_SOC_DM646x
+#define	MASK_CLE	0x80000
+#define	MASK_ALE	0x40000
+#else
 #define	MASK_CLE	0x10
 #define	MASK_ALE	0x08
+#endif
 
 #define NAND_READ_START		0x00
 #define NAND_READ_END		0x30