diff --git a/middleman-core/lib/middleman-more/extensions/automatic_image_sizes.rb b/middleman-core/lib/middleman-more/extensions/automatic_image_sizes.rb
index 594e374a..56cb6ebf 100644
--- a/middleman-core/lib/middleman-more/extensions/automatic_image_sizes.rb
+++ b/middleman-core/lib/middleman-more/extensions/automatic_image_sizes.rb
@@ -16,8 +16,6 @@ class Middleman::Extensions::AutomaticImageSizes < ::Middleman::Extension
     # @return [String]
     def image_tag(path, params={})
       if !params.key?(:width) && !params.key?(:height) && !path.include?('://')
-        params[:alt] ||= ''
-
         real_path = path
         real_path = File.join(images_dir, real_path) unless real_path.start_with?('/')
         full_path = File.join(source_dir, real_path)