diff --git a/[refs] b/[refs]
index 75039a325a61..889131117a83 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2e23f8513e9d0cc6d07d36e4555badc2518df433
+refs/heads/master: ea5415785146afe37dd2d1179a6c3a34fd26b52f
diff --git a/trunk/include/acpi/actypes.h b/trunk/include/acpi/actypes.h
index fff2d242ace4..ee1a11802b65 100644
--- a/trunk/include/acpi/actypes.h
+++ b/trunk/include/acpi/actypes.h
@@ -48,7 +48,8 @@
 
 /*
  * ACPI_MACHINE_WIDTH must be specified in an OS- or compiler-dependent header
- * and must be either 16, 32, or 64
+ * and must be either 32 or 64. 16-bit ACPICA is no longer supported, as of
+ * 12/2006.
  */
 #ifndef ACPI_MACHINE_WIDTH
 #error ACPI_MACHINE_WIDTH not defined