diff --git a/CHANGELOG.md b/CHANGELOG.md
index 83b42e1dd771..9f0a61413283 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - The environment variable used for resource detection has been changed from `OTEL_RESOURCE_LABELS` to `OTEL_RESOURCE_ATTRIBUTES` (#1042)
 - Replace `WithSyncer` with `WithBatcher` in examples. (#1044)
 - Replace the `google.golang.org/grpc/codes` dependency in the API with an equivalent `go.opentelemetry.io/otel/codes` package. (#1046)
+- Unify Callback Function Naming.
+   Rename `*Callback` with `*Func`. (#1061)
 
 ### Removed
 
diff --git a/api/metric/async.go b/api/metric/async.go
index 831e1af0276c..3f5a946adb8d 100644
--- a/api/metric/async.go
+++ b/api/metric/async.go
@@ -60,7 +60,7 @@ type Int64ObserverResult struct {
 	function   func([]kv.KeyValue, ...Observation)
 }
 
-// Float64ObserverResult is passed to an observer callback to captureGetHookFunc
+// Float64ObserverResult is passed to an observer callback to capture
 // observations for one asynchronous floating point metric instrument.
 type Float64ObserverResult struct {
 	instrument AsyncImpl