diff --git a/board/ms7722se/lowlevel_init.S b/board/ms7722se/lowlevel_init.S
index 9144e10..1cb57e7 100644
--- a/board/ms7722se/lowlevel_init.S
+++ b/board/ms7722se/lowlevel_init.S
@@ -131,7 +131,7 @@
 
 	write32	RTCSR_A, RTCSR_D
 
-	write8	SDMR3_A, #0x00
+	write8	SDMR3_A, SDMR3_D
 
 	! BL bit off (init = ON) (?!?)
 
@@ -225,6 +225,7 @@
 RTCSR_A:	.long	SBSC_RTCSR
 RTCSR_D:	.long	0xA55A0010
 SDMR3_A:	.long	0xFE500180
+SDMR3_D:	.long	0x0
 
 	.align	1