diff --git a/docs/README.md b/docs/README.md
index deb0b726aa..42458e3e96 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -16,6 +16,8 @@ $ cd react-bootstrap/docs
 $ npm install
 ```
 
+You must have previously run `npm install` from the main directory. 
+
 ### Instructions
 
 #### Development