diff --git a/drivers/mtd/spi/sandbox.c b/drivers/mtd/spi/sandbox.c
index d68ee4a..09ce783 100644
--- a/drivers/mtd/spi/sandbox.c
+++ b/drivers/mtd/spi/sandbox.c
@@ -359,9 +359,8 @@
 			debug(" id: off:%u tx:", sbsf->off);
 			if (sbsf->off < IDCODE_LEN) {
 				/* Extract correct byte from ID 0x00aabbcc */
-				id = ((((sbsf->data)->id[0]) << 16) |
-					(((sbsf->data)->id[1]) << 8 |
-					((sbsf->data)->id[2]))) >>
+				id = ((JEDEC_MFR(sbsf->data) << 16) |
+					JEDEC_ID(sbsf->data)) >>
 					(8 * (IDCODE_LEN - 1 - sbsf->off));
 			} else {
 				id = 0;