diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig
index e4a513b..ac0a929 100644
--- a/src/soc/intel/alderlake/Kconfig
+++ b/src/soc/intel/alderlake/Kconfig
@@ -381,10 +381,12 @@
 
 config PRERAM_CBMEM_CONSOLE_SIZE
 	hex
+	default 0x16000 if CONSOLE_SERIAL
 	default 0x2000
 
 config CONSOLE_CBMEM_BUFFER_SIZE
 	hex
+	default 0x100000 if CONSOLE_SERIAL
 	default 0x40000
 
 config FSP_TYPE_IOT