diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h
index 932a60d..5a0a3e5 100644
--- a/include/acpi/acconfig.h
+++ b/include/acpi/acconfig.h
@@ -219,6 +219,24 @@
 
 /******************************************************************************
  *
+ * Miscellaneous constants
+ *
+ *****************************************************************************/
+
+/* UUID constants */
+
+#define UUID_BUFFER_LENGTH          16	/* Length of UUID in memory */
+#define UUID_STRING_LENGTH          36	/* Total length of a UUID string */
+
+/* Positions for required hyphens (dashes) in UUID strings */
+
+#define UUID_HYPHEN1_OFFSET         8
+#define UUID_HYPHEN2_OFFSET         13
+#define UUID_HYPHEN3_OFFSET         18
+#define UUID_HYPHEN4_OFFSET         23
+
+/******************************************************************************
+ *
  * ACPI AML Debugger
  *
  *****************************************************************************/