diff --git a/search/Bfs.cc b/search/Bfs.cc
index 11e0c394..60df80fa 100644
--- a/search/Bfs.cc
+++ b/search/Bfs.cc
@@ -183,13 +183,14 @@ BfsIterator::visitParallel(Level to_level,
       while (levelLessOrEqual(first_level_, last_level_)
 	     && levelLessOrEqual(first_level_, to_level)) {
 	VertexSeq &level_vertices = queue_[first_level_];
+        Level level = first_level_;
 	incrLevel(first_level_);
 	if (!level_vertices.empty()) {
           size_t vertex_count = level_vertices.size();
           if (vertex_count < thread_count) {
             for (Vertex *vertex : level_vertices) {
               if (vertex) {
-                checkLevel(vertex, first_level_);
+                checkLevel(vertex, level);
                 vertex->setBfsInQueue(bfs_index_, false);
                 visitor->visit(vertex);
               }
@@ -206,7 +207,7 @@ BfsIterator::visitParallel(Level to_level,
                 for (size_t i = from; i < to; i++) {
                   Vertex *vertex = level_vertices[i];
                   if (vertex) {
-                    checkLevel(vertex, first_level_);
+                    checkLevel(vertex, level);
                     vertex->setBfsInQueue(bfs_index, false);
                     visitors[k]->visit(vertex);
                   }