diff -r 4bf4dda860e2 -r 744187ae41c3 ProtocolNumbers.wiki
--- a/ProtocolNumbers.wiki	Tue May 28 16:18:45 2019 +0100
+++ b/ProtocolNumbers.wiki	Fri May 31 12:11:24 2019 +0100
@@ -2,7 +2,7 @@
 
 = Protocol numbers =
 
-Hedgewars uses *protocol numbers* to encode different Hedgewars versions. The protocol number is mainly used on the server. The protocol number is important because players have to be on the same version to play together.
+Hedgewars uses *protocol numbers* to encode different Hedgewars versions. The protocol number is mainly used on the server. It's also used in the file name of demos (e.g. “DemoName.57.hwd”). The protocol number is important because players have to be on the same version to play together.
 
 In Hedgewars, all versions without a “-dev” are called “stable” releases. These are the releases you find on the official Download page. Note that for some releases, the protocol number is not increased. This is the case for backwards-compatible bugfix releases. Thus, protocol number 55 is valid for 0.9.24 and 0.9.24.1.