diff --git a/lib/rvm.zsh b/lib/rvm.zsh
index 597be1b3..dbfaf879 100644
--- a/lib/rvm.zsh
+++ b/lib/rvm.zsh
@@ -1,6 +1,10 @@
 # get the name of the branch we are on
 function rvm_prompt_info() {
   ruby_version=$(~/.rvm/bin/rvm-prompt 2> /dev/null) || return
+  if [ -z $ruby_version ]
+  then
+    return
+  fi
   echo "($ruby_version)"
 }