diff --git a/src/structure/parallel_structure.ts b/src/structure/parallel_structure.ts
index 343773a0bd9ecb2fe885f975df4f9bc2885073a6..d4dc9749f93e70512ae7b5b4500f012226feaa5b 100644
--- a/src/structure/parallel_structure.ts
+++ b/src/structure/parallel_structure.ts
@@ -159,6 +159,7 @@ export class ParallelStructure extends Nub {
                 }
             }
         }
+        this._result = res;
         return res;
     }