--- a/Flags.wiki	Thu Nov 12 20:13:51 2015 +0000
+++ b/Flags.wiki	Thu Nov 12 20:14:36 2015 +0000
@@ -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 of size 22×15 pixels.
+To create a flag, draw a PNG image (without transparency) of size 22×15 pixels.
 
 To install a flag, put it into `Data/Graphics/Flags` of the Hedgewars data directory.