diff --git a/src/ssb.rpc.c b/src/ssb.rpc.c
index 99b56822..17855822 100644
--- a/src/ssb.rpc.c
+++ b/src/ssb.rpc.c
@@ -1384,8 +1384,8 @@ static void _tf_ssb_get_peers_exhange_callback(
 	peers_exchange_t* data = user_data;
 	if (origin == k_tf_ssb_broadcast_origin_peer_exchange)
 	{
-		char fullid[k_id_base64_len] = { 0 };
-		tf_base64_encode(pub, sizeof(pub), fullid, sizeof(fullid));
+		char fullid[256] = { 0 };
+		tf_base64_encode(pub, k_id_bin_len, fullid, sizeof(fullid));
 		char* dot = strchr(fullid, '.');
 		if (dot)
 		{