diff --git a/nest/proto.c b/nest/proto.c
index 41b3a6b9..62e4e7c1 100644
--- a/nest/proto.c
+++ b/nest/proto.c
@@ -626,6 +626,7 @@ channel_copy_config(struct channel_config *src, struct proto_config *proto)
   struct channel_config *dst = cfg_alloc(src->channel->config_size);
 
   memcpy(dst, src, src->channel->config_size);
+  dst->n = (node) {};
   add_tail(&proto->channels, &dst->n);
   CALL(src->channel->copy_config, dst, src);