diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index 969f88c..18fb61d 100644
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -1580,7 +1580,7 @@
       s = session_event_get_session (wrk, e);
       if (PREDICT_FALSE (!s))
 	break;
-      CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+      CLIB_PREFETCH (s->tx_fifo, sizeof (*(s->tx_fifo)), LOAD);
       wrk->ctx.s = s;
       /* Spray packets in per session type frames, since they go to
        * different nodes */