diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c
index c18a73fe..3c18f80a 100644
--- a/proto/bgp/bgp.c
+++ b/proto/bgp/bgp.c
@@ -2771,5 +2771,12 @@ struct protocol proto_bgp = {
 
 void bgp_build(void)
 {
+  log(L_WARN "ALIGN: %d %d %d %d %d",
+      (int) _Alignof(net_addr),
+      (int) _Alignof(net_addr_ip4),
+      (int) _Alignof(net_addr_ip6),
+      (int) _Alignof(node),
+      (int) _Alignof(struct bgp_prefix));
+
   proto_build(&proto_bgp);
 }