diff --git a/runtime/syntax/README.txt b/runtime/syntax/README.txt
index d88bd7e..d6a86e5 100644
--- a/runtime/syntax/README.txt
+++ b/runtime/syntax/README.txt
@@ -13,6 +13,9 @@
 nosyntax.vim	Used for the ":syntax off" command.  Undo the loading of
 		synload.vim.
 
+The "shared" directory contains generated files and what is used by more than
+one syntax.
+
 
 A few special files: