diff --git a/src/main/java/net/schmizz/sshj/transport/TransportImpl.java b/src/main/java/net/schmizz/sshj/transport/TransportImpl.java
index 1cd6cb2b..e5738da9 100644
--- a/src/main/java/net/schmizz/sshj/transport/TransportImpl.java
+++ b/src/main/java/net/schmizz/sshj/transport/TransportImpl.java
@@ -420,9 +420,9 @@ public long write(SSHPacket payload)
         try {
 
             if (kexer.isKexOngoing()) {
-                // Only transport layer packets (1 to 49) allowed except SERVICE_REQUEST
+                // Only transport layer packets (1 to 49) allowed except SERVICE_REQUEST and IGNORE
                 final Message m = Message.fromByte(payload.array()[payload.rpos()]);
-                if (!m.in(1, 49) || m == Message.SERVICE_REQUEST) {
+                if (!m.in(1, 49) || m == Message.SERVICE_REQUEST || m == Message.IGNORE) {
                     assert m != Message.KEXINIT;
                     kexer.waitForDone();
                 }