diff --git a/projects/syncslides/app/src/main/java/io/v/android/apps/syncslides/discovery/ParticipantPeer.java b/projects/syncslides/app/src/main/java/io/v/android/apps/syncslides/discovery/ParticipantPeer.java
index 5454690..ff7e70c 100644
--- a/projects/syncslides/app/src/main/java/io/v/android/apps/syncslides/discovery/ParticipantPeer.java
+++ b/projects/syncslides/app/src/main/java/io/v/android/apps/syncslides/discovery/ParticipantPeer.java
@@ -119,6 +119,10 @@
      */
     @Override
     public boolean refreshData() {
+        if (mServiceName.equals(Unknown.SERVER_NAME)) {
+            // Don't attempt refresh.
+            return true;
+        }
         Log.d(TAG, "refreshData");
         // Flush, since the server might have died and restarted, invalidating
         // cached endpoints.