diff --git a/core/src/main/scala/spark/Utils.scala b/core/src/main/scala/spark/Utils.scala
index 9817272b0e..e40c5c5c8d 100644
--- a/core/src/main/scala/spark/Utils.scala
+++ b/core/src/main/scala/spark/Utils.scala
@@ -12,10 +12,12 @@ import org.apache.hadoop.fs.{Path, FileSystem, FileUtil}
 
 import scala.collection.mutable.{ArrayBuffer, HashMap}
 import scala.collection.JavaConversions._
+import scala.collection.Map
 import scala.io.Source
 import scala.reflect.ClassTag
 import scala.Some
 
+
 import com.google.common.io.Files
 import com.google.common.util.concurrent.ThreadFactoryBuilder