diff --git a/README.md b/README.md
index a48e6d2..944eae8 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,5 @@
 The `go-oracle` package provides an interface for Go's `oracle` tool.
 
 ![go-oracle](https://raw.github.com/rubyist/go-oracle/master/docs/go-oracle.gif)
+
+As a prerequisite, you must Install the `oracle` command to `$GOPATH/bin` with `go get code.google.com/p/go.tools/cmd/oracle`.