diff --git a/README.md b/README.md
index 6f34b7d..1c4811a 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,7 @@ cd Serious-Engine
 
 If you have access to a copy of the game (either by CD or through Steam),
 you can copy the *.gro files from the game directory to the repository.
+Not that for running SS:TFE, you don't need the ModEXT.txt file, it's only for SS:TSE.
 
 #### Building (only for SS:TSE)