diff --git a/data/gui/window/preferences/03_display.cfg b/data/gui/window/preferences/03_display.cfg
index 2c150e2e537..857bb69b3ce 100644
--- a/data/gui/window/preferences/03_display.cfg
+++ b/data/gui/window/preferences/03_display.cfg
@@ -178,7 +178,7 @@
 
 						[menu_button]
 							id = "choose_theme"
-							tooltip = _ "Change the in-game interface theme"
+							tooltip = _ "Change the in-game interface theme. Additional themes may be provided by community-made add-ons"
 						[/menu_button]
 					[/column]
 				[/row]