diff --git a/Module:-i3.md b/Module:-i3.md
index 0ba6322..fd893eb 100644
--- a/Module:-i3.md
+++ b/Module:-i3.md
@@ -73,6 +73,8 @@ ws-icon-2 = 3;♜
 ws-icon-3 = 4;♝
 ws-icon-4 = 5;♞
 ws-icon-default = ♟
+; NOTE: You cannot skip icons, e.g. to get a ws-icon-6
+; you must also define a ws-icon-5.
 
 ; Available tags:
 ;   <label-state> (default) - gets replaced with <label-(focused|unfocused|visible|urgent)>