diff --git a/.bashrc b/.bashrc
index d8112b3..5eb109a 100644
--- a/.bashrc
+++ b/.bashrc
@@ -153,16 +153,25 @@ ps1_host='\h'
 
 . $HOME/bin/bash_vcs.sh
 ps1_vcs='$(__prompt_command)'
-if type rvm-prompt >/dev/null 2>&1; then
-  ps1_ruby=' \[\e[0;34m\]$(rvm-prompt v g)\[\e[00m\]'
-elif [[ -n "$RUBY_VERSION" ]]; then
-  ps1_ruby=' \[\e[0;34m\]$RUBY_VERSION\[\e[00m\]'
-elif type ruby >/dev/null 2>&1; then
-  ps1_ruby=' \[\e[0;34m\]$(ruby -e "puts RUBY_VERSION")\[\e[00m\]'
-else
-  ps1_ruby=''
-fi
 
+__prompt_ruby_version() {
+  if type rvm-prompt >/dev/null 2>&1; then
+    rvm-prompt v g
+    return $?
+  fi
+
+  if [[ -n "$RUBY_ROOT" ]]; then
+    local ruby_version="$(basename "$RUBY_ROOT")"
+  elif type ruby > /dev/null 2>&1; then
+    local ruby_version="$(ruby -e "puts defined?(RUBY_ENGINE_VERSION) ? \"#{RUBY_ENGINE}-#{RUBY_ENGINE_VERSION}\" : \"ruby-#{RUBY_VERSION}\"")"
+  else
+    local ruby_version=''
+  fi
+
+  ruby_version="${ruby_version#ruby-}"
+  echo "$ruby_version"
+}
+ps1_ruby=' \[\e[0;34m\]$(__prompt_ruby_version)\[\e[00m\]'
 
 # set variable identifying the chroot you work in (used in the prompt below)
 if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then