diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index 28d7ed9..1d164f2 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -1512,6 +1512,10 @@
   clib_error_t *error = 0;
   int thread;
 
+  /* Already initialized */
+  if (tm->wrk_ctx)
+    return 0;
+
   if ((error = vlib_call_init_function (vm, ip_main_init)))
     return error;
   if ((error = vlib_call_init_function (vm, ip4_lookup_init)))