diff --git a/src/libpts/tcg/tcg_pts_attr_dh_nonce_finish.c b/src/libpts/tcg/tcg_pts_attr_dh_nonce_finish.c
index 3a40df05a..1b147516e 100644
--- a/src/libpts/tcg/tcg_pts_attr_dh_nonce_finish.c
+++ b/src/libpts/tcg/tcg_pts_attr_dh_nonce_finish.c
@@ -231,8 +231,8 @@ pa_tnc_attr_t *tcg_pts_attr_dh_nonce_finish_create(u_int8_t nonce_len,
 		.type = TCG_PTS_DH_NONCE_FINISH,
 		.nonce_len = nonce_len,
 		.hash_algo = hash_algo,
-		.initiator_nonce = initiator_nonce,
-		.initiator_pub_val = initiator_pub_val,
+		.initiator_nonce = chunk_clone(initiator_nonce),
+		.initiator_pub_val = chunk_clone(initiator_pub_val),
 	);
 
 	return &this->public.pa_tnc_attribute;
diff --git a/src/libpts/tcg/tcg_pts_attr_dh_nonce_params_resp.c b/src/libpts/tcg/tcg_pts_attr_dh_nonce_params_resp.c
index d9954c29b..cbbea4f91 100644
--- a/src/libpts/tcg/tcg_pts_attr_dh_nonce_params_resp.c
+++ b/src/libpts/tcg/tcg_pts_attr_dh_nonce_params_resp.c
@@ -249,8 +249,8 @@ pa_tnc_attr_t *tcg_pts_attr_dh_nonce_params_resp_create(u_int8_t nonce_len,
 		.nonce_len = nonce_len,
 		.dh_group = dh_group,
 		.hash_algo_set = hash_algo_set,
-		.responder_nonce = responder_nonce,
-		.responder_pub_val = responder_pub_val,
+		.responder_nonce = chunk_clone(responder_nonce),
+		.responder_pub_val = chunk_clone(responder_pub_val),
 	);
 
 	return &this->public.pa_tnc_attribute;