diff --git a/lib/bootstrap-sass/sass_functions.rb b/lib/bootstrap-sass/sass_functions.rb
index cca2489b..a78cc72c 100644
--- a/lib/bootstrap-sass/sass_functions.rb
+++ b/lib/bootstrap-sass/sass_functions.rb
@@ -16,7 +16,7 @@ module Sass::Script::Functions
     url = if Bootstrap.asset_pipeline? && (context = sprockets_context)
             context.send(:"#{type}_path", source.value)
           elsif Bootstrap.compass?
-            send(:"#{type}_url", source, Sass::Script::Bool.new(true)).value
+            send(:"#{type}_url", source, Sass::Script::Bool.new(true)).value.sub /url\((.*)\)$/, '\1'
           end
 
     # sass-only
@@ -46,4 +46,4 @@ module Sass::Script::Functions
       importer.context
     end
   end
-end
\ No newline at end of file
+end