diff --git a/qdp_project/src/Benchmark.cpp b/qdp_project/src/Benchmark.cpp
index c2f9752..cabb8aa 100644
--- a/qdp_project/src/Benchmark.cpp
+++ b/qdp_project/src/Benchmark.cpp
@@ -154,7 +154,7 @@ void aggr_j(size_t gid, size_t tid) {
 
     BARRIERS_[gid]->arrive_and_drop();
 
-    aggregation::happly(&DATA_DST_[gid + tid], aggregator);
+    aggregation::happly(&DATA_DST_[gid * tid], aggregator);
 }
 
 int main() {