diff --git a/discovery/README.md b/discovery/README.md
index a2899a35d..a4bdde9f3 100644
--- a/discovery/README.md
+++ b/discovery/README.md
@@ -133,9 +133,9 @@ the Prometheus server will be able to see them.
 
 A Service Discovery (SD) mechanism has to discover targets and provide them to Prometheus. We expect similar targets to be grouped together, in the form of a [`TargetGroup`](https://godoc.org/github.com/prometheus/prometheus/config#TargetGroup). The SD mechanism sends the targets down to prometheus as list of `TargetGroups`.
 
-An SD mechanism has to implement the `TargetProvider` Interface:
+An SD mechanism has to implement the `Discoverer` Interface:
 ```go
-type TargetProvider interface {
+type Discoverer interface {
 	Run(ctx context.Context, up chan<- []*config.TargetGroup)
 }
 ```