3 files changed, 4 insertions, 4 deletions
diff --git a/source/components/utilities/utglobal.c b/source/components/utilities/utglobal.c
index a41c17da727b..d4cde4dbea99 100644
--- a/source/components/utilities/utglobal.c
+++ b/source/components/utilities/utglobal.c
@@ -235,10 +235,7 @@ const ACPI_PREDEFINED_NAMES     AcpiGbl_PreDefinedNames[] =
     {"_REV",    ACPI_TYPE_INTEGER,          ACPI_CAST_PTR (char, 2)},
     {"_OS_",    ACPI_TYPE_STRING,           ACPI_OS_NAME},
     {"_GL_",    ACPI_TYPE_MUTEX,            ACPI_CAST_PTR (char, 1)},
-
-#if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
     {"_OSI",    ACPI_TYPE_METHOD,           ACPI_CAST_PTR (char, 1)},
-#endif
 
     /* Table terminator */
 
diff --git a/source/components/utilities/utmisc.c b/source/components/utilities/utmisc.c
index 0e04aff06972..c6dbf915c513 100644
--- a/source/components/utilities/utmisc.c
+++ b/source/components/utilities/utmisc.c
@@ -217,7 +217,8 @@ AcpiUtIsAmlTable (
     if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) ||
         ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_PSDT) ||
         ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT) ||
-        ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_OSDT))
+        ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_OSDT) ||
+        ACPI_IS_OEM_SIG (Table->Signature))
     {
         return (TRUE);
     }
diff --git a/source/components/utilities/utosi.c b/source/components/utilities/utosi.c
index e63690786417..3713d033b7e7 100644
--- a/source/components/utilities/utosi.c
+++ b/source/components/utilities/utosi.c
@@ -217,6 +217,8 @@ static ACPI_INTERFACE_INFO    AcpiDefaultSupportedInterfaces[] =
     {"Windows 2016",        NULL, 0, ACPI_OSI_WIN_10_RS1},       /* Windows 10 version 1607 - Added 12/2017 */
     {"Windows 2017",        NULL, 0, ACPI_OSI_WIN_10_RS2},       /* Windows 10 version 1703 - Added 12/2017 */
     {"Windows 2017.2",      NULL, 0, ACPI_OSI_WIN_10_RS3},       /* Windows 10 version 1709 - Added 02/2018 */
+    {"Windows 2018",        NULL, 0, ACPI_OSI_WIN_10_RS4},       /* Windows 10 version 1803 - Added 11/2018 */
+    {"Windows 2018.2",      NULL, 0, ACPI_OSI_WIN_10_RS5},       /* Windows 10 version 1809 - Added 11/2018 */
 
     /* Feature Group Strings */