diff --git a/src/northbridge/intel/nehalem/gma.c b/src/northbridge/intel/nehalem/gma.c
index fa84f78..7489fd4 100644
--- a/src/northbridge/intel/nehalem/gma.c
+++ b/src/northbridge/intel/nehalem/gma.c
@@ -304,6 +304,19 @@
 	return 0;
 }
 
+uintptr_t gma_get_gnvs_aslb(const void *gnvs)
+{
+	const global_nvs_t *gnvs_ptr = gnvs;
+	return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
+}
+
+void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
+{
+	global_nvs_t *gnvs_ptr = gnvs;
+	if (gnvs_ptr)
+		gnvs_ptr->aslb = aslb;
+}
+
 static void gma_pm_init_pre_vbios(struct device *dev)
 {
 	u32 reg32;
@@ -1136,7 +1149,7 @@
 	gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
 	if (gnvs) {
 		/* IGD OpRegion Base Address */
-		gnvs->aslb = (u32)(uintptr_t)opregion;
+		gma_set_gnvs_aslb(gnvs, (uintptr_t)opregion);
 	} else {
 		printk(BIOS_ERR, "Error: GNVS table not found.\n");
 	}