diff --git a/gamedir/Ja2.ini b/gamedir/Ja2.ini
index 208152f32..abaf13ce9 100644
--- a/gamedir/Ja2.ini
+++ b/gamedir/Ja2.ini
@@ -84,6 +84,7 @@ JA2_START_FILE = ja2.exe
 ; 21 ... 1920x1200
 ; 22 ... 2560x1440
 ; 23 ... 2560x1600
+; 24 ... Custom Resolution
 ;******************************************************************************************************************************
 
 ; The screen resolution of the game
@@ -92,9 +93,14 @@ SCREEN_RESOLUTION = 4
 ; The screen resolution of the map editor
 EDITOR_SCREEN_RESOLUTION = 4
 
+; Applicable only when set to Custom Resolution, minimum 800x600 in multiples of 2
+; Make sure monitor supports the custom resolution if playing in full screen mode
+CUSTOM_SCREEN_RESOLUTION_X = 0
+CUSTOM_SCREEN_RESOLUTION_Y = 0
+
 ;******************************************************************************************************************************
 ; Select windowed or full screen mode?
-; If you like to play in Windowed Mode, you have to switch your Windows Desktop Color Scheme to 16 Bit!
+; If you like to play in Windowed Mode, you have to switch your Windows Desktop Color Scheme/Compatibility Mode to 16 Bit!
 
 ; 0 ... Full Screen
 ; 1 ... Windowed Mode