diff --git a/gson/src/main/java/com/google/gson/JsonSerializationVisitor.java b/gson/src/main/java/com/google/gson/JsonSerializationVisitor.java
index 104b8b42..e55bcc09 100644
--- a/gson/src/main/java/com/google/gson/JsonSerializationVisitor.java
+++ b/gson/src/main/java/com/google/gson/JsonSerializationVisitor.java
@@ -124,15 +124,10 @@ final class JsonSerializationVisitor implements ObjectNavigator.Visitor {
       }
     } else {
       Object fieldValue = getFieldValue(f, obj);
-      // See if the fieldValue has better type information than the specified typeOfF
       // This takes care of situations where the field was declared as an Object, but the
       // actual value contains something more specific. See Issue 54.
-      if (fieldValue != null && typeOfF instanceof Class) {
-        Class<?> classOfF = (Class<?>) typeOfF;
-        Class<?> actualClassOfF = fieldValue.getClass();
-        if (classOfF.isAssignableFrom(actualClassOfF)) {
-          typeOfF = actualClassOfF;
-        }
+      if (fieldValue != null && typeOfF == Object.class) {
+        typeOfF = fieldValue.getClass();
       }
       addAsChildOfObject(f, typeOfF, fieldValue);
     }
diff --git a/gson/src/test/java/com/google/gson/functional/CollectionTest.java b/gson/src/test/java/com/google/gson/functional/CollectionTest.java
index 72ace47b..c3375c95 100644
--- a/gson/src/test/java/com/google/gson/functional/CollectionTest.java
+++ b/gson/src/test/java/com/google/gson/functional/CollectionTest.java
@@ -159,6 +159,14 @@ public class CollectionTest extends TestCase {
     assertEquals("[1,2,3,4,5,6,7,8,9]", gson.toJson(target));
   }
 
+  @SuppressWarnings("unchecked")
+  public void testRawCollectionSerialization() {
+    BagOfPrimitives bag1 = new BagOfPrimitives();
+    Collection target = Arrays.asList(bag1, bag1);
+    String json = gson.toJson(target);
+    assertTrue(json.contains(bag1.getExpectedJson()));
+  }
+
   public void testRawCollectionDeserializationNotAlllowed() {
     String json = "[0,1,2,3,4,5,6,7,8,9]";
     try {