diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 1c218d9478cb..80c74e90f3cc 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -829,6 +829,7 @@ struct acpi_parse_state {
 #define ACPI_PARSEOP_PREDEF_CHECKED     0x08
 #define ACPI_PARSEOP_SPECIAL            0x10
 #define ACPI_PARSEOP_COMPOUND           0x20
+#define ACPI_PARSEOP_ASSIGNMENT         0x40
 
 /*****************************************************************************
  *