diff --git a/report/id.go b/report/id.go
index 6836d926e..65bafc9a4 100644
--- a/report/id.go
+++ b/report/id.go
@@ -36,7 +36,10 @@ func MakeEndpointNodeID(hostID, namespaceID, address, port string) string {
 
 // MakeEndpointNodeIDB produces an endpoint node ID from its composite parts in binary, not strings.
 func MakeEndpointNodeIDB(hostID string, namespaceID uint64, addressIP net.IP, port uint16) string {
-	namespace := strconv.FormatUint(namespaceID, 10)
+	namespace := ""
+	if namespaceID > 0 {
+		namespace = strconv.FormatUint(namespaceID, 10)
+	}
 	return makeAddressID(hostID, namespace, addressIP.String(), addressIP) + ScopeDelim + strconv.Itoa(int(port))
 }