diff --git a/core/json-ext/src/test/scala/net/liftweb/json/ext/JsonBoxSerializerSpec.scala b/core/json-ext/src/test/scala/net/liftweb/json/ext/JsonBoxSerializerSpec.scala
index 910b630c3c..d1aa943498 100644
--- a/core/json-ext/src/test/scala/net/liftweb/json/ext/JsonBoxSerializerSpec.scala
+++ b/core/json-ext/src/test/scala/net/liftweb/json/ext/JsonBoxSerializerSpec.scala
@@ -39,13 +39,11 @@ object JsonBoxSerializerSpec extends Specification("JsonBoxSerializer Specificat
     parse("""{"name":"joe", "thing": "rog", "age":12}""").extract[Person] mustEqual Person("joe", Full(12), Empty, Full("rog"))
   }
 
-  
-
   "Extract boxed mother" in {
     val json = """{"name":"joe", "age":12, "mother": {"name":"ann", "age":53}}"""
     val p = parse(json).extract[Person]
     p mustEqual Person("joe", Full(12), Full(Person("ann", Full(53), Empty)))
-    (for { a1 <- p.age; m <-p.mother; a2 <- m.age } yield a1+a2) mustEqual Some(65)
+    (for { a1 <- p.age; m <-p.mother; a2 <- m.age } yield a1+a2) mustEqual Full(65)
   }
 
   "Render with age" in {
@@ -70,5 +68,5 @@ object JsonBoxSerializerSpec extends Specification("JsonBoxSerializer Specificat
 
 case class SomeException(msg: String) extends Exception
 
-case class Person(name: String, age: Option[Int], mother: Box[Person], thing: Box[String] = Empty)
+case class Person(name: String, age: Box[Int], mother: Box[Person], thing: Box[String] = Empty)
 
diff --git a/core/json/src/main/scala/net/liftweb/json/Meta.scala b/core/json/src/main/scala/net/liftweb/json/Meta.scala
index 8ce296e66f..b5ddee25df 100644
--- a/core/json/src/main/scala/net/liftweb/json/Meta.scala
+++ b/core/json/src/main/scala/net/liftweb/json/Meta.scala
@@ -107,7 +107,14 @@ private[json] object Meta {
         } else factory(fieldMapping(typeParameters(t, k, context)(valueTypeIndex))._1)
 
       def parameterizedTypeOpt(t: Type) = t match {
-        case x: ParameterizedType => Some(x)
+        case x: ParameterizedType => 
+          val typeArgs = x.getActualTypeArguments.toList.zipWithIndex
+            .map { case (t, idx) =>
+              if (t == classOf[java.lang.Object]) 
+                ScalaSigReader.readConstructor(context.argName, context.containingClass, context.allArgs.map(_._1))
+              else t
+            }
+          Some(mkParameterizedType(x.getRawType, typeArgs))
         case _ => None
       }
 
@@ -165,7 +172,7 @@ private[json] object Meta {
     case x => fail("Raw type of " + x + " not known")
   }
 
-  private[json] def mkParameterizedType(owner: Class[_], typeArgs: Seq[Class[_]]) = 
+  private[json] def mkParameterizedType(owner: Type, typeArgs: Seq[Type]) = 
     new ParameterizedType {
       def getActualTypeArguments = typeArgs.toArray
       def getOwnerType = owner