diff --git a/shell/ruby.sh b/shell/ruby.sh
index 9eb7e57..a1a9b2f 100644
--- a/shell/ruby.sh
+++ b/shell/ruby.sh
@@ -37,8 +37,11 @@ fi
 
 # Load rbenv or RVM depending on which is available
 if [ -d "$HOME/.rbenv/bin" ]; then
-  export PATH="$HOME/.rbenv/bin:$PATH"
-  eval "$(rbenv init -)"
+  # Don't load rbenv again if oh-my-zsh's rbenv plugin already has
+  if [[ ":$PATH:" != *":$HOME/.rbenv/bin:"* ]]; then
+    path_prepend "$HOME/.rbenv/bin"
+    eval "$(rbenv init -)"
+  fi
 elif [ -s "$HOME/.rvm/scripts/rvm" ]; then
   source "$HOME/.rvm/scripts/rvm"
 fi