diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig
index 1f0f2fe..9c5868b 100644
--- a/src/soc/intel/alderlake/Kconfig
+++ b/src/soc/intel/alderlake/Kconfig
@@ -208,7 +208,7 @@
 	default 0x10000
 
 config GFX_GMA_DEFAULT_MMIO
-	default 0xfa000000 if MAINBOARD_HAS_EARLY_LIBGFXINIT
+	default 0xaf000000 if MAINBOARD_HAS_EARLY_LIBGFXINIT
 
 # Intel recommends reserving the following resources per PCIe TBT root port,
 # from ADL BIOS Spec (doc #627270) Revision 0.6.0 Section 7.2.5.1.5