diff --git a/src/compiler/scala/tools/nsc/Interpreter.scala b/src/compiler/scala/tools/nsc/Interpreter.scala
index be079b2ec..0e21c55c4 100644
--- a/src/compiler/scala/tools/nsc/Interpreter.scala
+++ b/src/compiler/scala/tools/nsc/Interpreter.scala
@@ -88,8 +88,13 @@ class Interpreter(val compiler: Global, output: (String => Unit)) {
          shadow the old ones, and old code objects to refer to the old
          definitions.
   */
-  private val classLoader = new java.net.URLClassLoader(Predef.Array(classfilePath.toURL))
-
+  private val classLoader = {
+    if (parentClassLoader == null)
+      new java.net.URLClassLoader(Predef.Array(classfilePath.toURL))
+    else
+      new java.net.URLClassLoader(Predef.Array(classfilePath.toURL), parentClassLoader)
+  }
+	protected def parentClassLoader : ClassLoader = null;
    
   /** the previous requests this interpreter has processed */
   private val prevRequests = new ArrayBuffer[Request]()
diff --git a/src/compiler/scala/tools/nsc/MainInterpreter.scala b/src/compiler/scala/tools/nsc/MainInterpreter.scala
index 832fb208f..33f890f97 100644
--- a/src/compiler/scala/tools/nsc/MainInterpreter.scala
+++ b/src/compiler/scala/tools/nsc/MainInterpreter.scala
@@ -108,7 +108,7 @@ class InterpreterLoop(in: BufferedReader, out: PrintWriter) {
       interpretOne(line)
     true
   }
-
+	def parentClassLoader0 : ClassLoader = null;
 
 	/** process command-line arguments and do as they request */
   def main(args: Array[String]): unit = {
@@ -121,7 +121,9 @@ class InterpreterLoop(in: BufferedReader, out: PrintWriter) {
     }
     
     val compiler = new Global(command.settings, reporter)
-    interpreter = new Interpreter(compiler, str=>Console.print(str))
+    interpreter = new Interpreter(compiler, out.print) {
+      override protected def parentClassLoader = parentClassLoader0;
+    }
 
     try {
       if(!command.files.isEmpty) {