diff --git a/src/compiler/scala/reflect/internal/Types.scala b/src/compiler/scala/reflect/internal/Types.scala
index 952925a7ccce..9549d4ff943f 100644
--- a/src/compiler/scala/reflect/internal/Types.scala
+++ b/src/compiler/scala/reflect/internal/Types.scala
@@ -6069,7 +6069,7 @@ A type's typeSymbol should never be inspected directly.
 
   /** Perform operation `p` on arguments `tp1`, `arg2` and print trace of computation. */
   private def explain[T](op: String, p: (Type, T) => Boolean, tp1: Type, arg2: T): Boolean = {
-    Console.println(indent + tp1 + " " + op + " " + arg2 + "?" /* + "("+tp1.getClass+","+arg2.asInstanceOf[AnyRef].getClass+")"*/)
+    Console.println(indent + tp1 + " " + op + " " + arg2 + "?" /* + "("+tp1.getClass+","+arg2.getClass+")"*/)
     indent = indent + "  "
     val result = p(tp1, arg2)
     indent = indent dropRight 2
diff --git a/src/compiler/scala/tools/nsc/interpreter/TypeStrings.scala b/src/compiler/scala/tools/nsc/interpreter/TypeStrings.scala
index aa926adeccf0..6b56d881fcd8 100644
--- a/src/compiler/scala/tools/nsc/interpreter/TypeStrings.scala
+++ b/src/compiler/scala/tools/nsc/interpreter/TypeStrings.scala
@@ -56,7 +56,7 @@ trait TypeStrings {
     )
   }
   def scalaName(m: ClassManifest[_]): String = scalaName(m.erasure)
-  def anyClass(x: Any): JClass               = if (x == null) null else x.asInstanceOf[AnyRef].getClass
+  def anyClass(x: Any): JClass               = if (x == null) null else x.getClass
 
   private def brackets(tps: String*): String =
     if (tps.isEmpty) ""
diff --git a/src/compiler/scala/tools/nsc/io/Pickler.scala b/src/compiler/scala/tools/nsc/io/Pickler.scala
index bae69b6bfa46..5bb8bdda352a 100644
--- a/src/compiler/scala/tools/nsc/io/Pickler.scala
+++ b/src/compiler/scala/tools/nsc/io/Pickler.scala
@@ -246,7 +246,7 @@ object Pickler {
         p.tryPickle(wr, x) || qq.tryPickle(wr, x)
       def pickle(wr: Writer, x: T) =
         require(tryPickle(wr, x),
-                "no pickler found for "+x+" of class "+x.asInstanceOf[AnyRef].getClass.getName)
+                "no pickler found for "+x+" of class "+x.getClass.getName)
       def unpickle(rd: Lexer) = p.unpickle(rd) orElse qq.unpickle(rd)
     }
 
diff --git a/src/compiler/scala/tools/nsc/util/ScalaClassLoader.scala b/src/compiler/scala/tools/nsc/util/ScalaClassLoader.scala
index d6d19eef921c..07fe25441085 100644
--- a/src/compiler/scala/tools/nsc/util/ScalaClassLoader.scala
+++ b/src/compiler/scala/tools/nsc/util/ScalaClassLoader.scala
@@ -134,7 +134,7 @@ object ScalaClassLoader {
   }
 
   /** Finding what jar a clazz or instance came from */
-  def origin(x: Any): Option[URL] = originOfClass(x.asInstanceOf[AnyRef].getClass)
+  def origin(x: Any): Option[URL] = originOfClass(x.getClass)
   def originOfClass(x: Class[_]): Option[URL] =
     Option(x.getProtectionDomain.getCodeSource) flatMap (x => Option(x.getLocation))
 }
diff --git a/src/library/scala/MatchError.scala b/src/library/scala/MatchError.scala
index 4e19ed1c44cf..6aa46be6e407 100644
--- a/src/library/scala/MatchError.scala
+++ b/src/library/scala/MatchError.scala
@@ -25,7 +25,7 @@ final class MatchError(obj: Any) extends RuntimeException {
    */
   private lazy val objString =
     if (obj == null) "null"
-    else obj.toString() + " (of class " + obj.asInstanceOf[AnyRef].getClass.getName + ")"
+    else obj.toString() + " (of class " + obj.getClass.getName + ")"
 
   override def getMessage() = objString
 }
diff --git a/src/library/scala/collection/TraversableLike.scala b/src/library/scala/collection/TraversableLike.scala
index e3d51fde4ef9..32d697ebb49a 100644
--- a/src/library/scala/collection/TraversableLike.scala
+++ b/src/library/scala/collection/TraversableLike.scala
@@ -627,7 +627,7 @@ trait TraversableLike[+A, +Repr] extends HasNewBuilder[A, Repr]
    *           simple name of the collection class $coll.
    */
   def stringPrefix : String = {
-    var string = repr.asInstanceOf[AnyRef].getClass.getName
+    var string = repr.getClass.getName
     val idx1 = string.lastIndexOf('.' : Int)
     if (idx1 != -1) string = string.substring(idx1 + 1)
     val idx2 = string.indexOf('$')
diff --git a/src/library/scala/runtime/ScalaRunTime.scala b/src/library/scala/runtime/ScalaRunTime.scala
index c8cc6244685e..28a093ce428f 100644
--- a/src/library/scala/runtime/ScalaRunTime.scala
+++ b/src/library/scala/runtime/ScalaRunTime.scala
@@ -25,7 +25,7 @@ import java.lang.reflect.{ Modifier, Method => JMethod }
 object ScalaRunTime {
   def isArray(x: AnyRef): Boolean = isArray(x, 1)
   def isArray(x: Any, atLevel: Int): Boolean =
-    x != null && isArrayClass(x.asInstanceOf[AnyRef].getClass, atLevel)
+    x != null && isArrayClass(x.getClass, atLevel)
 
   private def isArrayClass(clazz: Class[_], atLevel: Int): Boolean =
     clazz.isArray && (atLevel == 1 || isArrayClass(clazz.getComponentType, atLevel - 1))