--- drivers/acpi/osl.c
+++ drivers/acpi/osl.c
@@ -70,6 +70,7 @@
 static OSD_HANDLER acpi_irq_handler = NULL;
 static void *acpi_irq_context = NULL;
 
+extern unsigned char AmlCode[];
 
 acpi_status
 acpi_os_initialize(void)
@@ -221,7 +222,10 @@
 	if (!existing_table || !new_table)
 		return AE_BAD_PARAMETER;
 
-	*new_table = NULL;
+	if (strncmp(existing_table->signature, "DSDT", 4) == 0)
+		*new_table = (acpi_table_header*)AmlCode;
+	else
+		*new_table = NULL;
 	return AE_OK;
 }