diff --git a/registry.go b/registry.go
index c6115c0..4656bc9 100644
--- a/registry.go
+++ b/registry.go
@@ -206,10 +206,7 @@ func (r *StandardRegistry) register(name string, i interface{}) error {
 	if _, ok := r.metrics[name]; ok {
 		return DuplicateMetric(name)
 	}
-	switch i.(type) {
-	case Counter, Gauge, GaugeFloat64, Healthcheck, Histogram, Meter, Timer:
-		r.metrics[name] = i
-	}
+	r.metrics[name] = i
 	return nil
 }