diff --git a/lib/rvm.zsh b/lib/rvm.zsh
index 597be1b33..58b6528d4 100644
--- a/lib/rvm.zsh
+++ b/lib/rvm.zsh
@@ -1,7 +1,9 @@
 # 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)"
+  if [ -n "$ruby_version" ]; then
+    echo "($ruby_version)"
+  fi
 }