diff --git a/gamedir/Ja2.ini b/gamedir/Ja2.ini
index 4dbc8a96b..88d6dd7d6 100644
--- a/gamedir/Ja2.ini
+++ b/gamedir/Ja2.ini
@@ -38,5 +38,13 @@ SCREEN_RESOLUTION = 1
 
 EDITOR_SCREEN_RESOLUTION = 1
 
+;******************************************************************************************************************************
+; Select windowed or full screen mode?
+; 0 ... Full Screen
+; 1 ... Windowed Mode
+;******************************************************************************************************************************
+
+SCREEN_MODE_WINDOWED = 0
+