diff --git a/lib/preview.bash b/lib/preview.bash
index 6e0d0357..306b475a 100644
--- a/lib/preview.bash
+++ b/lib/preview.bash
@@ -10,7 +10,8 @@ then
   THEMES="$BASH_IT/themes/*/*.theme.bash"
   for theme in $THEMES
   do
-    BASH_IT_THEME=$(basename -s '.theme.bash' $theme)
+    BASH_IT_THEME=${theme%.theme.bash}
+    BASH_IT_THEME=${BASH_IT_THEME##*/}
     echo "
     $BASH_IT_THEME"
     echo "" | bash --init-file $BASH_IT/bash_it.sh -i