diff --git a/include/netlink/handlers.h b/include/netlink/handlers.h
index 266dc44..f373f58 100644
--- a/include/netlink/handlers.h
+++ b/include/netlink/handlers.h
@@ -25,6 +25,7 @@ extern "C" {
 struct nl_cb;
 struct nl_sock;
 struct nl_msg;
+struct ucred;
 
 /**
  * @name Callback Typedefs
diff --git a/include/netlink/netlink.h b/include/netlink/netlink.h
index e8a75fd..689b755 100644
--- a/include/netlink/netlink.h
+++ b/include/netlink/netlink.h
@@ -36,6 +36,8 @@
 extern "C" {
 #endif
 
+struct ucred;
+
 extern int nl_debug;
 extern struct nl_dump_params nl_debug_dp;