diff --git a/lib/rvm.zsh b/lib/rvm.zsh
new file mode 100644
index 000000000..597be1b33
--- /dev/null
+++ b/lib/rvm.zsh
@@ -0,0 +1,7 @@
+# get the name of the branch we are on
+function rvm_prompt_info() {
+  ruby_version=$(~/.rvm/bin/rvm-prompt 2> /dev/null) || return
+  echo "($ruby_version)"
+}
+
+