--- a/LuaAPI.wiki	Mon Oct 12 19:08:33 2015 +0000
+++ b/LuaAPI.wiki	Mon Oct 12 19:11:19 2015 +0000
@@ -1050,7 +1050,7 @@
 </code>
 
 === <tt>!ShowMission(caption, subcaption, text, icon, time)</tt> ===
-Use to tell the player what he is supposed to do. If you use this function, a mission pop-up is shown for the amount of time specified in `time` (in milliseconds).
+Use to tell the player what he is supposed to do. If you use this function, a mission pop-up is shown for the amount of time specified in `time` (in milliseconds). If `time` is set to 0, it will be displayed for a default amount of time.
 This function replaces the *entire* text of the pop-up. Compare this to the global `Goals` variable, which *adds* to the default text without replacing it.
 
 `caption` is the text displayed in the first line, `subcaption` is displayed in the second line and `text` is the text displayed in the third and following lines.