1 files changed, 1 insertions, 0 deletions

diff --git a/core/dnsserver/zdirectives.go b/core/dnsserver/zdirectives.go
index b48154448..6dfb99226 100644
--- a/core/dnsserver/zdirectives.go
+++ b/core/dnsserver/zdirectives.go
@@ -51,4 +51,5 @@ var Directives = []string{
 	"erratic",
 	"whoami",
 	"on",
+	"sign",
 }