diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 734d062..dbb2cd5 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -374,11 +374,9 @@
       goto error;
     }
 
-  session->vpp_evt_q =
-    uword_to_pointer (mp->vpp_event_queue_address, svm_msg_q_t *);
-
   if (vcl_segment_attach_session (mp->segment_handle, mp->server_rx_fifo,
-				  mp->server_tx_fifo, 0, session))
+				  mp->server_tx_fifo,
+				  mp->vpp_event_queue_address, 0, session))
     {
       VDBG (0, "failed to attach fifos for %u", session->session_index);
       goto error;
@@ -412,7 +410,8 @@
   return session->session_index;
 
 error:
-  evt_q = uword_to_pointer (mp->vpp_event_queue_address, svm_msg_q_t *);
+  vcl_segment_attach_mq (vcl_vpp_worker_segment_handle (0),
+			 mp->vpp_event_queue_address, mp->mq_index, &evt_q);
   vcl_send_session_accepted_reply (evt_q, mp->context, mp->handle,
 				   VNET_API_ERROR_INVALID_ARGUMENT);
   vcl_session_free (wrk, session);
@@ -444,11 +443,10 @@
     }
 
   session->vpp_handle = mp->handle;
-  session->vpp_evt_q = uword_to_pointer (mp->vpp_event_queue_address,
-					 svm_msg_q_t *);
 
   if (vcl_segment_attach_session (mp->segment_handle, mp->server_rx_fifo,
-				  mp->server_tx_fifo, 0, session))
+				  mp->server_tx_fifo,
+				  mp->vpp_event_queue_address, 0, session))
     {
       VDBG (0, "failed to attach fifos for %u", session->session_index);
       session->session_state = VCL_STATE_DETACHED;
@@ -459,7 +457,7 @@
   if (mp->ct_rx_fifo)
     {
       if (vcl_segment_attach_session (mp->ct_segment_handle, mp->ct_rx_fifo,
-				      mp->ct_tx_fifo, 1, session))
+				      mp->ct_tx_fifo, (uword) ~0, 1, session))
 	{
 	  VDBG (0, "failed to attach ct fifos for %u", session->session_index);
 	  session->session_state = VCL_STATE_DETACHED;
@@ -571,12 +569,11 @@
   session->transport.lcl_port = mp->lcl_port;
   vcl_session_table_add_listener (wrk, mp->handle, sid);
   session->session_state = VCL_STATE_LISTEN;
-  session->vpp_evt_q = uword_to_pointer (mp->vpp_evt_q, svm_msg_q_t *);
 
   if (vcl_session_is_cl (session))
     {
       if (vcl_segment_attach_session (mp->segment_handle, mp->rx_fifo,
-				      mp->tx_fifo, 0, session))
+				      mp->tx_fifo, mp->vpp_evt_q, 0, session))
 	{
 	  VDBG (0, "failed to attach fifos for %u", session->session_index);
 	  session->session_state = VCL_STATE_DETACHED;
@@ -645,7 +642,9 @@
     }
 
   s->vpp_handle = mp->new_handle;
-  s->vpp_evt_q = uword_to_pointer (mp->vpp_evt_q, svm_msg_q_t *);
+
+  vcl_segment_attach_mq (vcl_vpp_worker_segment_handle (0), mp->vpp_evt_q,
+			 mp->vpp_thread_index, &s->vpp_evt_q);
 
   vcl_session_table_del_vpp_handle (wrk, mp->handle);
   vcl_session_table_add_vpp_handle (wrk, mp->new_handle, s->session_index);
@@ -856,7 +855,7 @@
   if (s->rx_fifo)
     {
       if (vcl_segment_attach_session (msg->segment_handle, msg->rx_fifo,
-				      msg->tx_fifo, 0, s))
+				      msg->tx_fifo, (uword) ~0, 0, s))
 	{
 	  VDBG (0, "failed to attach fifos for %u", s->session_index);
 	  return;