diff --git a/src/vnet/ipsec/ipsec.c b/src/vnet/ipsec/ipsec.c
index e95bd16..3ea2e4d 100644
--- a/src/vnet/ipsec/ipsec.c
+++ b/src/vnet/ipsec/ipsec.c
@@ -579,6 +579,13 @@
   a->block_align = 1;
   a->icv_size = 16;
 
+  a = im->crypto_algs + IPSEC_CRYPTO_ALG_CHACHA20_POLY1305;
+  a->enc_op_id = VNET_CRYPTO_OP_CHACHA20_POLY1305_ENC;
+  a->dec_op_id = VNET_CRYPTO_OP_CHACHA20_POLY1305_DEC;
+  a->alg = VNET_CRYPTO_ALG_CHACHA20_POLY1305;
+  a->iv_size = 8;
+  a->icv_size = 16;
+
   vec_validate (im->integ_algs, IPSEC_INTEG_N_ALG - 1);
   ipsec_main_integ_alg_t *i;