diff --git a/src/northbridge/intel/gm45/Kconfig b/src/northbridge/intel/gm45/Kconfig
index 98ce644..6ee6558 100644
--- a/src/northbridge/intel/gm45/Kconfig
+++ b/src/northbridge/intel/gm45/Kconfig
@@ -27,6 +27,10 @@
 	select INTEL_EDID
 	select INTEL_GMA_ACPI
 
+config CBFS_SIZE
+	hex
+	default 0x100000
+
 config BOOTBLOCK_NORTHBRIDGE_INIT
 	string
 	default "northbridge/intel/gm45/bootblock.c"