diff --git a/data/gui/window/mp_create_game.cfg b/data/gui/window/mp_create_game.cfg
index 5fe050dfd82..7a90cbcea62 100644
--- a/data/gui/window/mp_create_game.cfg
+++ b/data/gui/window/mp_create_game.cfg
@@ -1192,6 +1192,7 @@
 		[text_box]
 			id = "game_password"
 			definition = "default"
+			tooltip = _ "Set the password that people wanting to join your game as players must enter."
 		[/text_box]
 
 	[/column]