diff --git a/pkg/zonemgr/internal/zone-file-cache/zone_file_cache.go b/pkg/zonemgr/internal/zone-file-cache/zone_file_cache.go
index af37625..923e401 100644
--- a/pkg/zonemgr/internal/zone-file-cache/zone_file_cache.go
+++ b/pkg/zonemgr/internal/zone-file-cache/zone_file_cache.go
@@ -76,7 +76,7 @@ func (zoneFileCache *ZoneFileCache) generateHeaderSuffix() {
 	zoneFileCache.headerSuf = fmt.Sprintf(" %s %s %s %s)\n", refresh, retry, expire, ttl)
 
 	if zoneFileCache.nameServerIP != "" {
-		zoneFileCache.headerSuf += fmt.Sprintf("IN NS %s.\n", zoneFileCache.nameServerName)
+		zoneFileCache.headerSuf += fmt.Sprintf("@ IN NS %s.\n", zoneFileCache.nameServerName)
 		zoneFileCache.headerSuf += fmt.Sprintf("%s IN A %s\n", nameServerDefault, zoneFileCache.nameServerIP)
 	}
 }
diff --git a/pkg/zonemgr/internal/zone-file-cache/zone_file_cache_test.go b/pkg/zonemgr/internal/zone-file-cache/zone_file_cache_test.go
index 7a41002..9b8c991 100644
--- a/pkg/zonemgr/internal/zone-file-cache/zone_file_cache_test.go
+++ b/pkg/zonemgr/internal/zone-file-cache/zone_file_cache_test.go
@@ -24,7 +24,7 @@ var _ = Describe("cached zone file content maintenance", func() {
 	Describe("cached zone file initialization", func() {
 		const (
 			headerDefault   = "$ORIGIN vm. \n$TTL 3600 \n@ IN SOA ns.vm. email.vm. (0 3600 3600 1209600 3600)\n"
-			headerCustomFmt = "$ORIGIN vm.%s. \n$TTL 3600 \n@ IN SOA ns.vm.%s. email.vm.%s. (0 3600 3600 1209600 3600)\nIN NS ns.vm.%s.\nns IN A %s\n"
+			headerCustomFmt = "$ORIGIN vm.%s. \n$TTL 3600 \n@ IN SOA ns.vm.%s. email.vm.%s. (0 3600 3600 1209600 3600)\n@ IN NS ns.vm.%s.\nns IN A %s\n"
 			headerSoaSerial = "$ORIGIN vm. \n$TTL 3600 \n@ IN SOA ns.vm. email.vm. (12345 3600 3600 1209600 3600)\n"
 		)