diff --git a/src/java/org/apache/commons/collections/bag/AbstractMapBag.java b/src/java/org/apache/commons/collections/bag/AbstractMapBag.java
index 37d209a4d..e63ac9963 100644
--- a/src/java/org/apache/commons/collections/bag/AbstractMapBag.java
+++ b/src/java/org/apache/commons/collections/bag/AbstractMapBag.java
@@ -508,14 +508,15 @@ public abstract class AbstractMapBag<E> implements Bag<E> {
      * @param in the input stream
      * @throws IOException
      * @throws ClassNotFoundException
+     * @throws ClassCastException if the stream does not contain the correct objects
      */
-    @SuppressWarnings("unchecked")
-    protected void doReadObject(Map map, ObjectInputStream in) throws IOException,
+    protected void doReadObject(Map<E, MutableInteger> map, ObjectInputStream in) throws IOException,
             ClassNotFoundException {
         this.map = map;
         int entrySize = in.readInt();
         for (int i = 0; i < entrySize; i++) {
-            Object obj = in.readObject();
+            @SuppressWarnings("unchecked") // This will fail at runtime if the stream is incorrect
+            E obj = (E) in.readObject();
             int count = in.readInt();
             map.put(obj, new MutableInteger(count));
             size += count;
diff --git a/src/java/org/apache/commons/collections/bag/TreeBag.java b/src/java/org/apache/commons/collections/bag/TreeBag.java
index c49f2ad4b..716835a7d 100644
--- a/src/java/org/apache/commons/collections/bag/TreeBag.java
+++ b/src/java/org/apache/commons/collections/bag/TreeBag.java
@@ -125,11 +125,11 @@ public class TreeBag<E> extends AbstractMapBag<E> implements SortedBag<E>, Seria
     /**
      * Read the bag in using a custom routine.
      */
-    @SuppressWarnings("unchecked")
     private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
         in.defaultReadObject();
-        Comparator comp = (Comparator) in.readObject();
-        super.doReadObject(new TreeMap(comp), in);
+        @SuppressWarnings("unchecked")  // This will fail at runtime if the stream is incorrect
+        Comparator<? super E> comp = (Comparator<? super E>) in.readObject();
+        super.doReadObject(new TreeMap<E, MutableInteger>(comp), in);
     }
 
 }