diff --git a/router/java/src/net/i2p/router/transport/udp/PeerState.java b/router/java/src/net/i2p/router/transport/udp/PeerState.java
index 096729849..7397c4d51 100644
--- a/router/java/src/net/i2p/router/transport/udp/PeerState.java
+++ b/router/java/src/net/i2p/router/transport/udp/PeerState.java
@@ -109,7 +109,7 @@ public class PeerState {
     private final Queue<ResendACK> _currentACKsResend;
 
     /** when did we last send ACKs to the peer? */
-    private volatile long _lastACKSend;
+    protected volatile long _lastACKSend;
     /** when did we decide we need to ACK to this peer? */
     protected volatile long _wantACKSendSince;
     /** have we received a packet with the ECN bit set in the current second? */
@@ -358,8 +358,6 @@ public class PeerState {
             _sendWindowBytes = 4 * _mtu;
         _sendWindowBytesRemaining = _sendWindowBytes;
 
-        _lastACKSend = -1;
-
         _rto = INIT_RTO;
         _rtt = INIT_RTT;
         if (rtt > 0)
@@ -409,8 +407,6 @@ public class PeerState {
         _sendWindowBytes = 3 * _mtu;
         _sendWindowBytesRemaining = _sendWindowBytes;
 
-        _lastACKSend = -1;
-
         _rto = INIT_RTO;
         _rtt = INIT_RTT;
         if (rtt > 0)
diff --git a/router/java/src/net/i2p/router/transport/udp/PeerState2.java b/router/java/src/net/i2p/router/transport/udp/PeerState2.java
index 53e03fff8..44b9fb09c 100644
--- a/router/java/src/net/i2p/router/transport/udp/PeerState2.java
+++ b/router/java/src/net/i2p/router/transport/udp/PeerState2.java
@@ -274,9 +274,11 @@ public class PeerState2 extends PeerState implements SSU2Payload.PayloadCallback
         synchronized(this) {
             // cancel the ack timer
             _wantACKSendSince = 0;
+            _lastACKSend = _context.clock().now();
         }
         return _receivedMessages;
     }
+
     SSU2Bitfield getAckedMessages() { return _ackedMessages; }
 
     /**