diff --git a/src/ec/lenovo/h8/acpi/thinkpad.asl b/src/ec/lenovo/h8/acpi/thinkpad.asl
index 1dc7c0542f..7c5610607c 100644
--- a/src/ec/lenovo/h8/acpi/thinkpad.asl
+++ b/src/ec/lenovo/h8/acpi/thinkpad.asl
@@ -91,7 +91,7 @@ Device (HKEY)
 			}
 			Else
 			{
-				DHKN = DHKN & Not (Local0)
+				DHKN = DHKN & !Local0
 			}
 			If (EN)
 			{