diff --git a/src/lib/style-properties.html b/src/lib/style-properties.html
index b007551bd5..fd3e5e82a6 100644
--- a/src/lib/style-properties.html
+++ b/src/lib/style-properties.html
@@ -166,7 +166,7 @@
               p || '';
           }
         }
-        return parts.filter(function(v) {return v;}).join(';');
+        return parts.join(';');
       },
 
       applyProperties: function(rule, props) {