--- a/Flags.wiki	Tue Mar 29 21:58:51 2016 +0100
+++ b/Flags.wiki	Wed Mar 30 21:40:32 2016 +0100
@@ -6,7 +6,7 @@
 Flags are little rectangular images shown in the team bar as a team’s symbol.
 
 == Creating flags ==
-To create a flag, draw a PNG image (without transparency) of size 22×15 pixels.
+To create a flag, draw a PNG image (RGBA mode, but all pixels should be opaque) of size 22×15 pixels.
 
 To install a flag, put it into `Data/Graphics/Flags` of the Hedgewars data directory.