diff --git a/pkg/cluster/types.go b/pkg/cluster/types.go
index 5091e532d..fbaa39fb7 100644
--- a/pkg/cluster/types.go
+++ b/pkg/cluster/types.go
@@ -1,8 +1,12 @@
 package cluster
 
+// PostgresRole describes role of the node
 type PostgresRole string
 
 const (
-	Master  PostgresRole = "master"
+	// Master role
+	Master PostgresRole = "master"
+
+	// Replica role
 	Replica PostgresRole = "replica"
 )