diff --git a/src/vnet/session/application_local.c b/src/vnet/session/application_local.c
index d1df657..856f748 100644
--- a/src/vnet/session/application_local.c
+++ b/src/vnet/session/application_local.c
@@ -23,6 +23,9 @@
 {
   u32 n_conns;
 
+  if (!vlib_num_workers ())
+    return;
+
   n_conns = pool_elts (connections);
   if (n_conns > 2)
     return;