diff --git a/lib/dns/validator.c b/lib/dns/validator.c
index 4a18c62aec..7a50c70272 100644
--- a/lib/dns/validator.c
+++ b/lib/dns/validator.c
@@ -28,6 +28,7 @@
 
 #include <dns/validator.h>
 #include <dns/db.h>
+#include <dns/dnssec.h>
 #include <dns/events.h>
 #include <dns/keytable.h>
 #include <dns/name.h>