export GO15VENDOREXPERIMENT only on 1.5
diff --git a/README.md b/README.md
index ec6f5af..458fe57 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@
 1. Clone this repository into `$GOPATH/src/github.com/Masterminds/glide` and
    change directory into it
 2. Ensure that the environment variable GO15VENDOREXPERIMENT is set, for
-   example by running `export GO15VENDOREXPERIMENT=1`
+   example by running `export GO15VENDOREXPERIMENT=1` when using GO 1.5. Go 1.6 release makes vendoring behaviour the default.
 3. Run `make build`
 
 This will leave you with `./glide`, which you can put in your `$PATH` if