diff --git a/src/include/acpi/acpi.h b/src/include/acpi/acpi.h
index c5a04f0acc..49dd0c651c 100644
--- a/src/include/acpi/acpi.h
+++ b/src/include/acpi/acpi.h
@@ -746,7 +746,7 @@ typedef struct acpi_fadt {
 	u32 flags;
 	acpi_addr_t reset_reg;
 	u8 reset_value;
-	u16 ARM_boot_arch;	/* Revision 6 only, Revision 5: Must be zero */
+	u16 ARM_boot_arch;	/* Must be zero if ACPI Revision <= 5.0 */
 	u8 FADT_MinorVersion;	/* Must be zero if ACPI Revision <= 5.0 */
 	u32 x_firmware_ctl_l;
 	u32 x_firmware_ctl_h;
diff --git a/src/soc/amd/picasso/acpi.c b/src/soc/amd/picasso/acpi.c
index bab563c26e..2f55aeca44 100644
--- a/src/soc/amd/picasso/acpi.c
+++ b/src/soc/amd/picasso/acpi.c
@@ -105,7 +105,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 			ACPI_FADT_REMOTE_POWER_ON;
 	fadt->flags |= cfg->fadt_flags; /* additional board-specific flags */
 
-	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->ARM_boot_arch = 0;	/* Must be zero if ACPI Revision <= 5.0 */
 	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_firmware_ctl_l = 0;	/* set to 0 if firmware_ctrl is used */
diff --git a/src/soc/amd/stoneyridge/acpi.c b/src/soc/amd/stoneyridge/acpi.c
index c3c77fca13..ec22704838 100644
--- a/src/soc/amd/stoneyridge/acpi.c
+++ b/src/soc/amd/stoneyridge/acpi.c
@@ -97,7 +97,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_S4_RTC_VALID |
 				ACPI_FADT_REMOTE_POWER_ON;
 
-	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->ARM_boot_arch = 0;	/* Must be zero if ACPI Revision <= 5.0 */
 	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_firmware_ctl_l = 0;	/* set to 0 if firmware_ctrl is used */
diff --git a/src/southbridge/amd/agesa/hudson/fadt.c b/src/southbridge/amd/agesa/hudson/fadt.c
index 7461fe0f76..fb887980da 100644
--- a/src/southbridge/amd/agesa/hudson/fadt.c
+++ b/src/southbridge/amd/agesa/hudson/fadt.c
@@ -62,7 +62,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_S4_RTC_VALID |
 				ACPI_FADT_REMOTE_POWER_ON;
 
-	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->ARM_boot_arch = 0;	/* Must be zero if ACPI Revision <= 5.0 */
 	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_pm1a_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
diff --git a/src/southbridge/amd/cimx/sb800/fadt.c b/src/southbridge/amd/cimx/sb800/fadt.c
index 8fe8bfde8e..101c2bf317 100644
--- a/src/southbridge/amd/cimx/sb800/fadt.c
+++ b/src/southbridge/amd/cimx/sb800/fadt.c
@@ -86,7 +86,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_S4_RTC_VALID |
 				ACPI_FADT_REMOTE_POWER_ON;
 
-	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->ARM_boot_arch = 0;	/* Must be zero if ACPI Revision <= 5.0 */
 	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_pm1a_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
diff --git a/src/southbridge/amd/pi/hudson/fadt.c b/src/southbridge/amd/pi/hudson/fadt.c
index 3f4f0cb891..a30202a74f 100644
--- a/src/southbridge/amd/pi/hudson/fadt.c
+++ b/src/southbridge/amd/pi/hudson/fadt.c
@@ -62,7 +62,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_S4_RTC_VALID |
 				ACPI_FADT_REMOTE_POWER_ON;
 
-	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->ARM_boot_arch = 0;	/* Must be zero if ACPI Revision <= 5.0 */
 	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_firmware_ctl_l = 0;	/* set to 0 if firmware_ctrl is used */