diff --git a/EFI/OC/ACPI/SSDT-OCWork-dell.aml b/EFI/OC/ACPI/SSDT-OCWork-dell.aml
new file mode 100644
index 0000000..1aa59a2
Binary files /dev/null and b/EFI/OC/ACPI/SSDT-OCWork-dell.aml differ
diff --git a/EFI/OC/ACPI/SSDT-OCWork-dell.dsl b/EFI/OC/ACPI/SSDT-OCWork-dell.dsl
new file mode 100644
index 0000000..543afda
--- /dev/null
+++ b/EFI/OC/ACPI/SSDT-OCWork-dell.dsl
@@ -0,0 +1,16 @@
+//
+DefinitionBlock("", "SSDT", 2, "OCLT", "OCWork", 0)
+{
+    External (_SB.ACOS, IntObj)
+    External (_SB.ACSE, IntObj)
+    
+    Scope (\)
+    {
+        If (_OSI ("Darwin"))
+        {
+            \_SB.ACOS = 0x80
+            \_SB.ACSE = 0 //ACSE=0:win7;;ACSE=1:win8
+        }
+    }
+}
+//EOF
diff --git a/EFI/OC/Config.plist b/EFI/OC/Config.plist
index b6c6d61..b00d33b 100644
--- a/EFI/OC/Config.plist
+++ b/EFI/OC/Config.plist
@@ -54,6 +54,14 @@
 				<key>Path</key>
 				<string>SSDT-RHUB.aml</string>
 			</dict>
+			<dict>
+				<key>Comment</key>
+				<string>Fix Dell brightness</string>
+				<key>Enabled</key>
+				<true/>
+				<key>Path</key>
+				<string>SSDT-OCWork-dell.aml</string>
+			</dict>
 		</array>
 		<key>Delete</key>
 		<array>