diff --git a/tools/node.js b/tools/node.js
index 227c23bd..07c62d1e 100644
--- a/tools/node.js
+++ b/tools/node.js
@@ -61,5 +61,5 @@ function describe_ast() {
         }
     };
     doitem(AST_Node);
-    return out + "";
+    return out + "\n";
 }