diff --git a/src/soc/amd/stoneyridge/Kconfig b/src/soc/amd/stoneyridge/Kconfig
index 5e4800f..1af3ccb 100644
--- a/src/soc/amd/stoneyridge/Kconfig
+++ b/src/soc/amd/stoneyridge/Kconfig
@@ -300,7 +300,7 @@
 
 config SMM_RESERVED_SIZE
 	hex
-	default 0x140000
+	default 0x150000
 
 config ACPI_CPU_STRING
 	string