diff --git a/pkg/labels/labels.go b/pkg/labels/labels.go
index 63c3992cebd..5c980d4dea0 100644
--- a/pkg/labels/labels.go
+++ b/pkg/labels/labels.go
@@ -23,10 +23,11 @@ import (
 
 // Labels allows you to present labels independently from their storage.
 type Labels interface {
+	// Get returns the value identified by the label.
 	Get(label string) (value string)
 }
 
-// Set is a map of label:value. Implements Labels.
+// Set is a map of label:value. It implements Labels.
 type Set map[string]string
 
 // String returns all labels listed as a human readable string.
diff --git a/pkg/labels/selector.go b/pkg/labels/selector.go
index 215ae479561..f22adcf3d8d 100644
--- a/pkg/labels/selector.go
+++ b/pkg/labels/selector.go
@@ -87,7 +87,7 @@ func try(selectorPiece, op string) (lhs, rhs string, ok bool) {
 	return "", "", false
 }
 
-// SelectorFromSet converts a Set into a Selector.
+// SelectorFromSet returns a Selector which will match exactly the given Set.
 func SelectorFromSet(ls Set) Selector {
 	var items []Selector
 	for label, value := range ls {