diff --git a/src/syntax.coffee b/src/syntax.coffee
index 20d69a9d8..ac5edb3e0 100644
--- a/src/syntax.coffee
+++ b/src/syntax.coffee
@@ -76,7 +76,7 @@ class Syntax extends GrammarRegistry
     _.pluck matchingScopedProperties, 'properties'
 
   buildScopeElement: (scope) ->
-    scope = new Array(scope...)
+    scope = scope.slice()
     element = $$ ->
       elementsForRemainingScopes = =>
         classString = scope.shift()