diff --git a/pkg/apiserver/installer/conversion.go b/pkg/apiserver/installer/conversion.go
index df8285b3..ca70e616 100644
--- a/pkg/apiserver/installer/conversion.go
+++ b/pkg/apiserver/installer/conversion.go
@@ -63,7 +63,12 @@ func ConvertURLValuesToV1beta2MetricListOptions(in *url.Values, out *cmv1beta2.M
 
 // RegisterConversions adds conversion functions to the given scheme.
 func RegisterConversions(s *runtime.Scheme) error {
-	return s.AddConversionFunc((*url.Values)(nil), (*cmv1beta1.MetricListOptions)(nil), func(a, b interface{}, scope conversion.Scope) error {
+	if err := s.AddConversionFunc((*url.Values)(nil), (*cmv1beta1.MetricListOptions)(nil), func(a, b interface{}, scope conversion.Scope) error {
 		return ConvertURLValuesToV1beta1MetricListOptions(a.(*url.Values), b.(*cmv1beta1.MetricListOptions), scope)
+	}); err != nil {
+		return err
+	}
+	return s.AddConversionFunc((*url.Values)(nil), (*cmv1beta2.MetricListOptions)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return ConvertURLValuesToV1beta2MetricListOptions(a.(*url.Values), b.(*cmv1beta2.MetricListOptions), scope)
 	})
 }