diff --git a/framework/src/main/java/org/apache/felix/framework/util/ImmutableList.java b/framework/src/main/java/org/apache/felix/framework/util/ImmutableList.java
index f0a1a9c..ba1cc94 100644
--- a/framework/src/main/java/org/apache/felix/framework/util/ImmutableList.java
+++ b/framework/src/main/java/org/apache/felix/framework/util/ImmutableList.java
@@ -76,6 +76,18 @@
     {
         throw new UnsupportedOperationException();
     }
+    
+    @Override
+    public void clear()
+    {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public boolean retainAll(java.util.Collection<?> c) 
+    {
+        throw new UnsupportedOperationException();
+    }
 
     @Override
     public Iterator<E> iterator()