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diff --git a/src/library/scalax/collection/mutable/HashMap.scala b/src/library/scalax/collection/mutable/HashMap.scala
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+++ b/src/library/scalax/collection/mutable/HashMap.scala
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+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2009, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id: HashMap.scala 16893 2009-01-13 13:09:22Z cunei $
+
+
+package scalax.collection.mutable
+
+import generic._
+
+/** This class implements mutable maps using a hashtable.
+ *
+ *  @author  Matthias Zenger
+ *  @author  Martin Odersky
+ *  @version 2.8
+ */
+object HashMap  extends MapFactory[HashMap] {
+
+  /** The empty map of this type */
+  def empty[A, B] = new HashMap[A, B]
+
+}
+
+@serializable
+class HashMap[A, B]
+  extends Map[A, B]
+     with MapTemplate[A, B, HashMap]
+     with HashTable[A]
+     with DefaultMapModel[A, B] {
+
+  def empty[B] = HashMap.empty[A, B]
+
+  def -= (key: A) { removeEntry(key) }
+
+  override def clear() = super.clear()
+
+  override def clone(): Map[A, B] = new HashMap[A, B] ++ this
+}