diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index f0af6f875f523..f86b6d1e5d7bc 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -732,9 +732,9 @@ private[spark] class Client(
       }
     val amClass =
       if (isClusterMode) {
-        Class.forName("org.apache.spark.deploy.yarn.ApplicationMaster").getName
+        Utils.classForName("org.apache.spark.deploy.yarn.ApplicationMaster").getName
       } else {
-        Class.forName("org.apache.spark.deploy.yarn.ExecutorLauncher").getName
+        Utils.classForName("org.apache.spark.deploy.yarn.ExecutorLauncher").getName
       }
     if (args.primaryRFile != null && args.primaryRFile.endsWith(".R")) {
       args.userArgs = ArrayBuffer(args.primaryRFile) ++ args.userArgs