diff --git a/hcloud/rdns.go b/hcloud/rdns.go
index c6cb26e49..1a8aaf53b 100644
--- a/hcloud/rdns.go
+++ b/hcloud/rdns.go
@@ -44,3 +44,9 @@ func RDNSLookup(i interface{}, ip net.IP) (string, error) {
 
 	return rdns.GetDNSPtrForIP(ip)
 }
+
+// Make sure that all expected Resources actually implement the interface
+var _ RDNSSupporter = &FloatingIP{}
+var _ RDNSSupporter = &PrimaryIP{}
+var _ RDNSSupporter = &Server{}
+var _ RDNSSupporter = &LoadBalancer{}