diff --git a/src/backend/distributed/master/worker_node_manager.c b/src/backend/distributed/master/worker_node_manager.c
index 42354299c..0953bf7d2 100644
--- a/src/backend/distributed/master/worker_node_manager.c
+++ b/src/backend/distributed/master/worker_node_manager.c
@@ -303,7 +303,7 @@ uint32
 WorkerGetLiveNodeCount(void)
 {
 	List *workerNodeList = ActiveWorkerNodeList();
-	uint32 liveWorkerCount = workerNodeList->length;
+	uint32 liveWorkerCount = list_length(workerNodeList);
 
 	return liveWorkerCount;
 }