diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index a95eae9c69a0ba4e80f690f03cfdb2ba1a00f90c..a89e24532251c0aeab6fab118a99dbde7ec0c057 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -459,7 +459,9 @@ private[spark] object Utils extends Logging {
 
   private def listFilesSafely(file: File): Seq[File] = {
     val files = file.listFiles()
-    if (files == null) throw new IOException("Failed to list files for dir: " + file)
+    if (files == null) {
+      throw new IOException("Failed to list files for dir: " + file)
+    }
     files
   }