1 files changed, 1 insertions, 1 deletions
diff --git a/lib/generators/website.js b/lib/generators/website.js
index a671ca7..de833d3 100644
--- a/lib/generators/website.js
+++ b/lib/generators/website.js
@@ -50,7 +50,7 @@ Generator.prototype.prepareStyles = function() {
     this.styles = _.chain(this.styles)
         .map(function(style) {
             var stylePath = that.options.styles[style];
-            if (fs.existsSync(path.resolve(that.book.root, stylePath))) {
+            if (stylePath && fs.existsSync(path.resolve(that.book.root, stylePath))) {
                 return [style, stylePath];
             }
             return null;