diff --git a/drivers/acpi/acpica/utosi.c b/drivers/acpi/acpica/utosi.c
index 8afa1ccaf12e..bec395921cc4 100644
--- a/drivers/acpi/acpica/utosi.c
+++ b/drivers/acpi/acpica/utosi.c
@@ -74,6 +74,7 @@ static struct acpi_interface_info acpi_default_supported_interfaces[] = {
 	{"Windows 2018.2", NULL, 0, ACPI_OSI_WIN_10_RS5},	/* Windows 10 version 1809 - Added 11/2018 */
 	{"Windows 2019", NULL, 0, ACPI_OSI_WIN_10_19H1},	/* Windows 10 version 1903 - Added 08/2019 */
 	{"Windows 2020", NULL, 0, ACPI_OSI_WIN_10_20H1},	/* Windows 10 version 2004 - Added 08/2021 */
+	{"Windows 2021", NULL, 0, ACPI_OSI_WIN_11},	/* Windows 11 - Added 01/2022 */
 
 	/* Feature Group Strings */
 
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 02c1fa16e638..362037fc63a6 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -1303,6 +1303,7 @@ typedef enum {
 #define ACPI_OSI_WIN_10_RS5             0x13
 #define ACPI_OSI_WIN_10_19H1            0x14
 #define ACPI_OSI_WIN_10_20H1            0x15
+#define ACPI_OSI_WIN_11                 0x16
 
 /* Definitions of getopt */