diff --git a/vendor/chance/lib/chance/imagers/data_url.rb b/vendor/chance/lib/chance/imagers/data_url.rb
index e5804721..a5995f7c 100644
--- a/vendor/chance/lib/chance/imagers/data_url.rb
+++ b/vendor/chance/lib/chance/imagers/data_url.rb
@@ -14,7 +14,7 @@ def css
       slices.each do |name, slice|
         # so, the path should be the path in the chance instance
         output += "." + slice[:css_name] + " { "
-        output += "background-image: url("
+        output += "background: url("
         output += '"data:image/png;base64,'
         
         base64Image = Base64.encode64(slice[:image].to_blob({ :fast_rgba => true }))