dnspacket: add missing include

diff --git a/pdns/dnspacket.hh b/pdns/dnspacket.hh
index 846df0a54a3035a7db3ee48d0d5c53ba59be3488..ce2a5722ff0ec30490c4476517cd1c690e11c606 100644 (file)
--- a/pdns/dnspacket.hh
+++ b/pdns/dnspacket.hh
@@ -27,6 +27,7 @@
 #include "iputils.hh"
 #include "ednssubnet.hh"
 #include "ednscookies.hh"
+#include <optional>
 #include <unordered_set>
 #include <sys/socket.h>
 #include <netinet/in.h>