diff --git a/core/src/main/java/com/google/bitcoin/core/NotFoundMessage.java b/core/src/main/java/com/google/bitcoin/core/NotFoundMessage.java
index 6eaa3d1f..4f769778 100644
--- a/core/src/main/java/com/google/bitcoin/core/NotFoundMessage.java
+++ b/core/src/main/java/com/google/bitcoin/core/NotFoundMessage.java
@@ -24,6 +24,8 @@ import java.util.List;
  * as an inventory message and lists the hashes of the missing items.
  */
 public class NotFoundMessage extends InventoryMessage {
+    public static int MIN_PROTOCOL_VERSION = 70001;
+
     public NotFoundMessage(NetworkParameters params) {
         super(params);
     }
@@ -32,8 +34,8 @@ public class NotFoundMessage extends InventoryMessage {
         super(params, payloadBytes);
     }
 
-    public NotFoundMessage(NetworkParameters unitTestParams, List<InventoryItem> items) {
-        super(unitTestParams);
+    public NotFoundMessage(NetworkParameters params, List<InventoryItem> items) {
+        super(params);
         this.items = new ArrayList<InventoryItem>(items);
     }
 }
diff --git a/core/src/main/java/com/google/bitcoin/core/Peer.java b/core/src/main/java/com/google/bitcoin/core/Peer.java
index 5425769a..da4a18fa 100644
--- a/core/src/main/java/com/google/bitcoin/core/Peer.java
+++ b/core/src/main/java/com/google/bitcoin/core/Peer.java
@@ -32,7 +32,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import javax.annotation.Nullable;
-import java.net.InetSocketAddress;
 import java.util.*;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.CopyOnWriteArraySet;
@@ -1382,7 +1381,7 @@ public class Peer extends PeerSocketHandler {
     }
 
     private boolean isNotFoundMessageSupported() {
-        return vPeerVersionMessage.clientVersion >= 70001;
+        return vPeerVersionMessage.clientVersion >= NotFoundMessage.MIN_PROTOCOL_VERSION;
     }
 
     /**