--- old/src/java.base/share/classes/java/net/ServerSocket.java	2018-06-04 11:02:17.384275154 -0700
+++ new/src/java.base/share/classes/java/net/ServerSocket.java	2018-06-04 11:02:17.124275149 -0700
@@ -76,10 +76,11 @@
     private boolean oldImpl = false;
 
     /**
-     * Package-private constructor to create a ServerSocket associated with
-     * the given SocketImpl.
+     * Creates a server socket with a user-specified SocketImpl.
+     *
+     * @param      impl the user-specified SocketImpl
      */
-    ServerSocket(SocketImpl impl) {
+    protected ServerSocket(SocketImpl impl) {
         this.impl = impl;
         impl.setServerSocket(this);
     }