diff --git a/README.md b/README.md
index 97ffc45..939ef46 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Since 1.5.2, following _environnement variable_ can set the project properties i
 `PALETTES` : path to the blends (or json) containing materials palettes  
 `BRUSHES` : path to the blend containing brushes to load  
 `PREFIXES` : list of prefix (comma separated uppercase letters between 1 and 6 character, ex: 'AN,SP,L')  
-`SUFFIXES` : list of suffixes (comma separated uppercase letters between 1 and 6 character, ex: 'OL,UL')  
+`SUFFIXES` : list of suffixes (comma separated uppercase letters of 2 character, ex: 'OL,UL')  
 `SEPARATOR` : Separator character to determine prefixes, default is '_' (should not be a special regex character)  
 
 ### Passive action