diff --git a/src/mdns.h b/src/mdns.h
index e53f79a1..79ec05fe 100644
--- a/src/mdns.h
+++ b/src/mdns.h
@@ -25,6 +25,7 @@
 #include "getdns/getdns.h"
 #include "types-internal.h"
 #include "util-internal.h"
+#include "platform.h"
 #include "util/lruhash.h"
 #include "config.h"