diff --git a/core/src/main/java/org/bitcoinj/core/PeerGroup.java b/core/src/main/java/org/bitcoinj/core/PeerGroup.java
index 288158b3..eed78296 100644
--- a/core/src/main/java/org/bitcoinj/core/PeerGroup.java
+++ b/core/src/main/java/org/bitcoinj/core/PeerGroup.java
@@ -831,14 +831,14 @@ public class PeerGroup implements TransactionBroadcaster {
     /**
      * Convenience for connecting only to peers that can serve specific services. It will configure suitable peer
      * discoveries.
-     * @param services Required services as a bitmask, e.g. {@link VersionMessage#NODE_NETWORK}.
+     * @param requiredServices Required services as a bitmask, e.g. {@link VersionMessage#NODE_NETWORK}.
      */
     public void setRequiredServices(long requiredServices) {
         lock.lock();
         try {
             this.requiredServices = requiredServices;
             peerDiscoverers.clear();
-            peerDiscoverers.add(MultiplexingDiscovery.forServices(params, requiredServices));
+            addPeerDiscovery(MultiplexingDiscovery.forServices(params, requiredServices));
         } finally {
             lock.unlock();
         }