diff --git a/src/vnet/ipsec/esp.h b/src/vnet/ipsec/esp.h
index 73d4326..50c4d39 100644
--- a/src/vnet/ipsec/esp.h
+++ b/src/vnet/ipsec/esp.h
@@ -259,7 +259,7 @@
   ipsec_proto_main_t *em = &ipsec_proto_main;
   vlib_thread_main_t *tm = vlib_get_thread_main ();
 
-  memset (em, 0, sizeof (em[0]));
+  clib_memset (em, 0, sizeof (em[0]));
 
   vec_validate (em->ipsec_proto_main_crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
   em->ipsec_proto_main_crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].type =