diff --git a/pkg/api/v1/generated.proto b/pkg/api/v1/generated.proto
index 80806b2390..04975e55aa 100644
--- a/pkg/api/v1/generated.proto
+++ b/pkg/api/v1/generated.proto
@@ -519,6 +519,8 @@ message EndpointAddress {
   // The IP of this endpoint.
   // May not be loopback (127.0.0.0/8), link-local (169.254.0.0/16),
   // or link-local multicast ((224.0.0.0/24).
+  // IPv6 is also accepted but not fully supported on all platforms. Also, certain
+  // kubernetes components, like kube-proxy, are not IPv6 ready.
   // TODO: This should allow hostname or IP, See #4447.
   optional string ip = 1;