diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index c0786d4..e4d6cc8 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -105,6 +105,10 @@
 
 acpi_status acpi_purge_cached_objects(void);
 
+acpi_status acpi_install_interface(acpi_string interface_name);
+
+acpi_status acpi_remove_interface(acpi_string interface_name);
+
 /*
  * ACPI Memory management
  */
@@ -263,6 +267,8 @@
 acpi_status acpi_install_exception_handler(acpi_exception_handler handler);
 #endif
 
+acpi_status acpi_install_interface_handler(acpi_interface_handler handler);
+
 /*
  * Event interfaces
  */