diff --git a/apis/rds/v1alpha1/custom_types.go b/apis/rds/v1alpha1/custom_types.go
index 35a005eb57..9eafbe7e73 100644
--- a/apis/rds/v1alpha1/custom_types.go
+++ b/apis/rds/v1alpha1/custom_types.go
@@ -18,6 +18,7 @@ package v1alpha1
 
 import xpv1 "github.com/crossplane/crossplane-runtime/apis/common/v1"
 
+// CustomDBParameterGroupParameters are custom parameters for DBParameterGroup
 type CustomDBParameterGroupParameters struct{}
 
 // CustomDBClusterParameters are custom parameters for DBCluster
diff --git a/pkg/controller/rds/dbparametergroup/setup.go b/pkg/controller/rds/dbparametergroup/setup.go
index 281202cdbc..dc433f7840 100644
--- a/pkg/controller/rds/dbparametergroup/setup.go
+++ b/pkg/controller/rds/dbparametergroup/setup.go
@@ -14,6 +14,7 @@ import (
 	svcapitypes "github.com/crossplane/provider-aws/apis/rds/v1alpha1"
 )
 
+// SetupDBParameterGroup adds a controller that reconciles DBParametergroup.
 func SetupDBParameterGroup(mgr ctrl.Manager, l logging.Logger, rl workqueue.RateLimiter) error {
 	name := managed.ControllerName(svcapitypes.DBParameterGroupGroupKind)
 	return ctrl.NewControllerManagedBy(mgr).