diff --git a/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/SingleSourceShortestPathTraverser.java b/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/SingleSourceShortestPathTraverser.java
index 9b89be5b62..cbe69c9ca5 100644
--- a/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/SingleSourceShortestPathTraverser.java
+++ b/hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/algorithm/SingleSourceShortestPathTraverser.java
@@ -78,7 +78,9 @@ public NodeWithWeight weightedShortestPath(Id sourceV, Id targetV,
                                                String weight, long degree,
                                                long skipDegree, long capacity) {
         E.checkNotNull(sourceV, "source vertex id");
+        E.checkNotNull(targetV, "target vertex id");
         this.checkVertexExist(sourceV, "source vertex");
+        this.checkVertexExist(targetV, "target vertex");
         E.checkNotNull(dir, "direction");
         E.checkNotNull(weight, "weight property");
         checkDegree(degree);