diff --git a/apps/messageicons/icons/generate.js b/apps/messageicons/icons/generate.js
index f4fec1c4a..0070c66a4 100755
--- a/apps/messageicons/icons/generate.js
+++ b/apps/messageicons/icons/generate.js
@@ -1,6 +1,7 @@
 #!/usr/bin/node
 
 // Creates lib.js from icons
+// This file is generated by /icons/generate.js, so if you need to modify its content, you should do it there, not directly in lib.js
 // npm install png-js
 
 // default icon must come first in icon_names