1 files changed, 1 insertions, 1 deletions
diff --git a/lib/ast.js b/lib/ast.js
index 1b75bd64..3fd197e8 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -86,7 +86,7 @@ var AST_SimpleStatement = DEFNODE("SimpleStatement", null, {
     $documentation: "A statement consisting of an expression, i.e. a = 1 + 2."
 }, AST_Statement);
 
-var AST_BlockStatement = DEFNODE("BlockStatement", null, {
+var AST_BlockStatement = DEFNODE("BlockStatement", "required", {
     $documentation: "A block statement.",
     _walk: function(visitor) {
         return visitor._visit(this, function(){