diff --git a/src/soc/amd/cezanne/Kconfig b/src/soc/amd/cezanne/Kconfig
index 2cedf8c2d0..075404b662 100644
--- a/src/soc/amd/cezanne/Kconfig
+++ b/src/soc/amd/cezanne/Kconfig
@@ -124,6 +124,10 @@ config PRERAM_CBMEM_CONSOLE_SIZE
 	help
 	  Increase this value if preram cbmem console is getting truncated
 
+config CBFS_MCACHE_SIZE
+	hex
+	default 0x2000 if VBOOT_STARTS_BEFORE_BOOTBLOCK
+
 config C_ENV_BOOTBLOCK_SIZE
 	hex
 	default 0x10000
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig
index 5897c7cfce..b93027734a 100644
--- a/src/soc/amd/picasso/Kconfig
+++ b/src/soc/amd/picasso/Kconfig
@@ -134,6 +134,10 @@ config PRERAM_CBMEM_CONSOLE_SIZE
 	help
 	  Increase this value if preram cbmem console is getting truncated
 
+config CBFS_MCACHE_SIZE
+	hex
+	default 0x2000 if VBOOT_STARTS_BEFORE_BOOTBLOCK
+
 config C_ENV_BOOTBLOCK_SIZE
 	hex
 	default 0x10000