diff --git a/shell/ruby.sh b/shell/ruby.sh
index 529115c..c14a5f4 100755
--- a/shell/ruby.sh
+++ b/shell/ruby.sh
@@ -47,10 +47,16 @@ if [ -n "$BASH_VERSION" ]; then
   alias bcn="bundle clean"
 fi
 
-if [ -n "$(command -v rbenv)" ]; then
-  eval "$(rbenv init --no-rehash -)"
+# lazy-load rbenv
+if [ -d "$HOME/.rbenv/shims" ]; then
+  path_prepend "$HOME/.rbenv/shims"
 fi
 
+rbenv() {
+  eval "$(command rbenv init -)"
+  rbenv "$@"
+}
+
 # lunchy auto-completion
 if [ -n "$BASH_VERSION" ]; then
   if which gem &> /dev/null && gem which lunchy &> /dev/null; then