diff --git a/src/include/spd_bin.h b/src/include/spd_bin.h
index 6552d7a66bb..4714b92d0b7 100644
--- a/src/include/spd_bin.h
+++ b/src/include/spd_bin.h
@@ -8,6 +8,7 @@
 
 #define SPD_PAGE_LEN		256
 #define SPD_PAGE_LEN_DDR4	512
+#define SPD_LEN_DDR5		1024
 #define SPD_PAGE_0		(0x6C >> 1)
 #define SPD_PAGE_1		(0x6E >> 1)
 #define SPD_DRAM_TYPE		2
diff --git a/src/lib/spd_cache.c b/src/lib/spd_cache.c
index adb5ade06e8..1398da6fb78 100644
--- a/src/lib/spd_cache.c
+++ b/src/lib/spd_cache.c
@@ -210,7 +210,7 @@ enum cb_err spd_fill_from_cache(uint8_t *spd_cache, struct spd_block *blk)
 	dram_type = *(spd_cache + SC_SPD_OFFSET(i) + SPD_DRAM_TYPE);
 
 	if (dram_type == SPD_DRAM_DDR5)
-		blk->len = CONFIG_DIMM_SPD_SIZE;
+		blk->len = SPD_LEN_DDR5;
 	else if (dram_type == SPD_DRAM_DDR4)
 		blk->len = SPD_PAGE_LEN_DDR4;
 	else
diff --git a/src/soc/intel/common/block/smbus/smbuslib.c b/src/soc/intel/common/block/smbus/smbuslib.c
index 750a3669ae7..0040c148976 100644
--- a/src/soc/intel/common/block/smbus/smbuslib.c
+++ b/src/soc/intel/common/block/smbus/smbuslib.c
@@ -15,7 +15,7 @@ static void update_spd_len(struct spd_block *blk)
 
 	/* If spd used is DDR5, then its length is 1024 byte. */
 	if (j == SPD_DRAM_DDR5)
-		blk->len = CONFIG_DIMM_SPD_SIZE;
+		blk->len = SPD_LEN_DDR5;
 	/* If spd used is DDR4, then its length is 512 byte. */
 	else if (j == SPD_DRAM_DDR4)
 		blk->len = SPD_PAGE_LEN_DDR4;