diff --git a/manager/allocator/networkallocator/portallocator.go b/manager/allocator/networkallocator/portallocator.go
index 10843b73e4..49dcbf6c57 100644
--- a/manager/allocator/networkallocator/portallocator.go
+++ b/manager/allocator/networkallocator/portallocator.go
@@ -155,7 +155,7 @@ func (pa *portAllocator) serviceDeallocatePorts(s *api.Service) {
 }
 
 func (pa *portAllocator) isPortsAllocated(s *api.Service) bool {
-	if s.Endpoint == nil {
+	if s.Endpoint == nil || s.Spec.Endpoint == nil {
 		return false
 	}