diff --git a/README.md b/README.md
index 9cf9f69..078b426 100644
--- a/README.md
+++ b/README.md
@@ -582,7 +582,7 @@ Files from runtime directories are always sourced in alphabetical order.
 
 Some users may want to split their plugin specs in multiple files.
 Instead of passing a spec table to `setup()`, you can use a Lua module.
-The specs from the **module** and any **sub-modules** will be merged together in the final spec,
+The specs from the **module** and any top-level **sub-modules** will be merged together in the final spec,
 so it is not needed to add `require` calls in your main plugin file to the other files.
 
 The benefits of using this approach: