diff --git a/machine/PCB_SWTG024AS_A_2_0_1.c b/machine/PCB_SWTG024AS_A_2_0_1.c
index 56f26c57..1bf376a6 100644
--- a/machine/PCB_SWTG024AS_A_2_0_1.c
+++ b/machine/PCB_SWTG024AS_A_2_0_1.c
@@ -2,6 +2,7 @@
 
 __code const struct machine machine = {
     MACHINE_COMMON_SETTING,
+    .mac_flash_offset = 0x1FC000,
     .n_sfp = 2,
     .log_to_phys_port = {0, 0, 0, 5, 1, 2, 3, 4, 6},
     .phys_to_log_port = {4, 5, 6, 7, 3, 8, 0, 0, 0},
diff --git a/machine/SIRIVISION_S25G2206FP_V1_1.c b/machine/SIRIVISION_S25G2206FP_V1_1.c
index 3f0db022..b7d5c36c 100644
--- a/machine/SIRIVISION_S25G2206FP_V1_1.c
+++ b/machine/SIRIVISION_S25G2206FP_V1_1.c
@@ -2,6 +2,7 @@
 
 __code const struct machine machine = {
 	MACHINE_COMMON_SETTING,
+	.mac_flash_offset = 0x1FC000,
 	.n_sfp = 2,
 	.log_to_phys_port = {0, 0, 0, 6, 1, 2, 3, 4, 5},
 	.phys_to_log_port = {4, 5, 6, 7, 8, 3, 0, 0, 0},