--- a/share/hedgewars/Data/Names/README.md	Thu Apr 25 21:25:16 2019 +0200
+++ b/share/hedgewars/Data/Names/README.md	Thu Apr 25 23:01:05 2019 +0200
@@ -42,7 +42,9 @@
 * Each hog of this team gets a random hat of this list. Repeat a hat name to
   jack up its probability.
 
-Each team is again separated by a separator line.
+Each team is again separated by a separator line. The team name must not
+contain characters that would be forbidden in a file name (such as “/”,
+“\” or “:”).
 
 At the end of the final team, this line must be written (without the spaces):