diff --git a/doc/README.rockchip b/doc/README.rockchip
index ce8ce77..347fc05 100644
--- a/doc/README.rockchip
+++ b/doc/README.rockchip
@@ -90,7 +90,7 @@
 To write an image that boots from an SD card (assumed to be /dev/sdc):
 
    ./firefly-rk3288/tools/mkimage -T rksd -d firefly-rk3288/spl/u-boot-spl-dtb.bin out
-   sudo dd if=out of=/dev/sdc
+   sudo dd if=out of=/dev/sdc seek=64
    sudo dd if=firefly-rk3288/u-boot-dtb.img of=/dev/sdc seek=256
 
 This puts the Rockchip header and SPL image first and then places the U-Boot
diff --git a/tools/rksd.c b/tools/rksd.c
index 2efcd68..a8dbe98 100644
--- a/tools/rksd.c
+++ b/tools/rksd.c
@@ -14,9 +14,7 @@
 #include "rkcommon.h"
 
 enum {
-	RKSD_HEADER0_START	= 64 * RK_BLK_SIZE,
-	RKSD_SPL_HDR_START	= RKSD_HEADER0_START +
-					RK_CODE1_OFFSET * RK_BLK_SIZE,
+	RKSD_SPL_HDR_START	= RK_CODE1_OFFSET * RK_BLK_SIZE,
 	RKSD_SPL_START		= RKSD_SPL_HDR_START + 4,
 	RKSD_HEADER_LEN		= RKSD_SPL_START,
 };
@@ -44,11 +42,8 @@
 	unsigned int size;
 	int ret;
 
-	/* Zero the whole header. The first 32KB is empty */
-	memset(buf,  '\0',  RKSD_HEADER0_START);
-
 	size = params->file_size - RKSD_SPL_HDR_START;
-	ret = rkcommon_set_header(buf + RKSD_HEADER0_START, size);
+	ret = rkcommon_set_header(buf, size);
 	if (ret) {
 		/* TODO(sjg@chromium.org): This method should return an error */
 		printf("Warning: SPL image is too large (size %#x) and will not boot\n",