diff --git a/src/rx/rx.c b/src/rx/rx.c
index 77ea8ca769..eebf1cbc57 100644
--- a/src/rx/rx.c
+++ b/src/rx/rx.c
@@ -5524,7 +5524,7 @@ rxi_Send(register struct rx_call *call, register struct rx_packet *p,
      * idle connections) */
     conn->lastSendTime = call->lastSendTime = clock_Sec();
     /* Don't count keepalives here, so idleness can be tracked. */
-    if (p->header.type != RX_PACKET_TYPE_ACK)
+    if ((p->header.type != RX_PACKET_TYPE_ACK) || (((struct rx_ackPacket *)rx_DataOf(p))->reason != RX_ACK_PING))
 	call->lastSendData = call->lastSendTime;
 }