diff --git a/faiss/IndexHNSW.cpp b/faiss/IndexHNSW.cpp
index a0ff524c1..017dda615 100644
--- a/faiss/IndexHNSW.cpp
+++ b/faiss/IndexHNSW.cpp
@@ -1042,7 +1042,7 @@ void IndexHNSWCagra::search(
         std::vector<storage_idx_t> nearest(n);
         std::vector<float> nearest_d(n);
 
-#pragma omp for
+#pragma omp parallel for
         for (idx_t i = 0; i < n; i++) {
             std::unique_ptr<DistanceComputer> dis(
                     storage_distance_computer(this->storage));