diff --git a/pkg/runtime/inject/inject.go b/pkg/runtime/inject/inject.go
index 9af45b93f6..48cd2f2cd9 100644
--- a/pkg/runtime/inject/inject.go
+++ b/pkg/runtime/inject/inject.go
@@ -72,6 +72,8 @@ func ConfigInto(config *rest.Config, i interface{}) (bool, error) {
 
 // Client is used by the ControllerManager to inject client into Sources, EventHandlers, Predicates, and
 // Reconciles
+// Deprecated: pass a client.Client to the manager directly.
+// The client to be used by the ControllerManager can directly be passed as cluster Options.
 type Client interface {
 	InjectClient(client.Client) error
 }