diff --git a/python_bindings/nmslib.cc b/python_bindings/nmslib.cc
index 764de97..d203547 100644
--- a/python_bindings/nmslib.cc
+++ b/python_bindings/nmslib.cc
@@ -138,7 +138,7 @@ struct IndexWrapper {
     {
       py::gil_scoped_release l;
 
-      ParallelFor(0, queries.size(), num_threads, [&](size_t query_index) {
+      ParallelFor(0, queries.size(), num_threads, [&](size_t query_index, size_t threadId) {
         KNNQuery<dist_t> knn(*space, queries[query_index], k);
         index->Search(&knn, -1);
         results[query_index].reset(knn.Result()->Clone());