diff --git a/src/common/comp/brute_force.cc b/src/common/comp/brute_force.cc
index bf408727..dc36f739 100644
--- a/src/common/comp/brute_force.cc
+++ b/src/common/comp/brute_force.cc
@@ -426,9 +426,7 @@ BruteForce::SearchSparseWithBuf(const DataSetPtr base_dataset, const DataSetPtr
             }
         }));
     }
-    for (auto& fut : futs) {
-        fut.get();
-    }
+    follt::collect(futs.begin(), futs.end()).get();
     return Status::success;
 }
 
diff --git a/src/index/sparse/sparse_index_node.cc b/src/index/sparse/sparse_index_node.cc
index fd574156..3e79cc0b 100644
--- a/src/index/sparse/sparse_index_node.cc
+++ b/src/index/sparse/sparse_index_node.cc
@@ -95,9 +95,7 @@ class SparseInvertedIndexNode : public IndexNode {
                                bitset);
             }));
         }
-        for (auto& fut : futs) {
-            fut.get();
-        }
+        follt::collect(futs.begin(), futs.end()).get();
         return GenResultDataSet(nq, k, p_id.release(), p_dist.release());
     }