diff --git a/src/southbridge/intel/bd82x6x/lpc.c b/src/southbridge/intel/bd82x6x/lpc.c
index 987db360e2..55e2573eff 100644
--- a/src/southbridge/intel/bd82x6x/lpc.c
+++ b/src/southbridge/intel/bd82x6x/lpc.c
@@ -726,12 +726,12 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 	}
 	fadt->p_lvl2_lat = c2_latency;
 	fadt->p_lvl3_lat = 87;
-	fadt->flush_size = 1024;
-	fadt->flush_stride = 16;
+	/* flush_* is ignored if ACPI_FADT_WBINVD is set */
+	fadt->flush_size = 0;
+	fadt->flush_stride = 0;
 	/* P_CNT not supported */
 	fadt->duty_offset = 0;
 	fadt->duty_width = 0;
-
 	fadt->day_alrm = 0xd;
 	fadt->mon_alrm = 0x00;
 	fadt->century = 0x00;
diff --git a/src/southbridge/intel/ibexpeak/lpc.c b/src/southbridge/intel/ibexpeak/lpc.c
index 0d15b5d8fa..54b2621bca 100644
--- a/src/southbridge/intel/ibexpeak/lpc.c
+++ b/src/southbridge/intel/ibexpeak/lpc.c
@@ -620,12 +620,12 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 	}
 	fadt->p_lvl2_lat = c2_latency;
 	fadt->p_lvl3_lat = 87;
-	fadt->flush_size = 1024;
-	fadt->flush_stride = 16;
+	/* flush_* is ignored if ACPI_FADT_WBINVD is set */
+	fadt->flush_size = 0;
+	fadt->flush_stride = 0;
 	/* P_CNT not supported */
 	fadt->duty_offset = 0;
 	fadt->duty_width = 0;
-
 	fadt->day_alrm = 0xd;
 	fadt->mon_alrm = 0x00;
 	fadt->century = 0x32;