Index: uspace/lib/ui/include/types/ui/ui.h
===================================================================
--- uspace/lib/ui/include/types/ui/ui.h	(revision b48e680f7fd780655df7bd1559d565a3abb1f45f)
+++ uspace/lib/ui/include/types/ui/ui.h	(revision bad765aeead3c3c8a80a051d57b663e07ef71cf2)
@@ -43,7 +43,9 @@
 
 /** Use the default display service (argument to ui_create()) */
-#define UI_DISPLAY_DEFAULT NULL
+#define UI_DISPLAY_DEFAULT "disp@"
 /** Use the default console service (argument to ui_create()) */
 #define UI_CONSOLE_DEFAULT "cons@"
+/** Use any available service (argument to ui_create()) */
+#define UI_ANY_DEFAULT "@"
 /** Use dummy output (argument to ui_create()) */
 #define UI_DISPLAY_NULL "null@"
@@ -57,4 +59,6 @@
 	/** Console */
 	ui_ws_console,
+	/** Any non-dummy output backend */
+	ui_ws_any,
 	/** Dummy output */
 	ui_ws_null