diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index df729bf0537f..e3ab1ff8a828 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -73,6 +73,7 @@
 #define ACPI_SIG_LPIT           "LPIT"	/* Low Power Idle Table */
 #define ACPI_SIG_MCFG           "MCFG"	/* PCI Memory Mapped Configuration table */
 #define ACPI_SIG_MCHI           "MCHI"	/* Management Controller Host Interface table */
+#define ACPI_SIG_MSDM           "MSDM"	/* Microsoft Data Management Table */
 #define ACPI_SIG_MTMR           "MTMR"	/* MID Timer table */
 #define ACPI_SIG_SLIC           "SLIC"	/* Software Licensing Description Table */
 #define ACPI_SIG_SPCR           "SPCR"	/* Serial Port Console Redirection table */
@@ -933,6 +934,21 @@ struct acpi_table_mchi {
 	u8 pci_function;
 };
 
+/*******************************************************************************
+ *
+ * MSDM - Microsoft Data Management table
+ *
+ * Conforms to "Microsoft Software Licensing Tables (SLIC and MSDM)",
+ * November 29, 2011. Copyright 2011 Microsoft
+ *
+ ******************************************************************************/
+
+/* Basic MSDM table is only the common ACPI header */
+
+struct acpi_table_msdm {
+	struct acpi_table_header header;	/* Common ACPI table header */
+};
+
 /*******************************************************************************
  *
  * MTMR - MID Timer Table
@@ -961,8 +977,7 @@ struct acpi_mtmr_entry {
  * SLIC - Software Licensing Description Table
  *
  * Conforms to "Microsoft Software Licensing Tables (SLIC and MSDM)",
- * November 29, 2011
- * Copyright 2011 Microsoft
+ * November 29, 2011. Copyright 2011 Microsoft
  *
  ******************************************************************************/