diff --git a/include/acpi/acpredef.h b/include/acpi/acpredef.h
index e6452dbf39e3..16a9ca9a66e4 100644
--- a/include/acpi/acpredef.h
+++ b/include/acpi/acpredef.h
@@ -167,7 +167,7 @@ static const union acpi_predefined_info predefined_names[] = {
 	{.info = {"_BFS", 1, 0}},
 	{.info = {"_BIF", 0, ACPI_RTYPE_PACKAGE}}, {.ret_info = {ACPI_PTYPE1_FIXED, ACPI_RTYPE_INTEGER,
 					  9,
-					  ACPI_RTYPE_STRING, 4, 0}},	/* fixed (9 Int),(4 Str) */
+					  ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER, 4, 0}},	/* fixed (9 Int),(4 Str) */
 	{.info = {"_BLT", 3, 0}},
 	{.info = {"_BMC", 1, 0}},
 	{.info = {"_BMD", 0, ACPI_RTYPE_PACKAGE}}, {.ret_info = {ACPI_PTYPE1_FIXED, ACPI_RTYPE_INTEGER, 5, 0, 0, 0}},	/* fixed (5 Int) */