diff --git a/coredns_bridge.js b/coredns_bridge.js
index 0b69bea..f85926d 100644
--- a/coredns_bridge.js
+++ b/coredns_bridge.js
@@ -15,7 +15,7 @@ function DomainToCoreDNS(domain) {
 // Inverse of DomainToCoreDNS
 function CoreDNSToDomain(corednsDomain) {
     corednsDomain = corednsDomain.substring(8);
-    const parts = domain.split("/");
+    const parts = corednsDomain.split("/");
     if (parts.length < 2) return false;
     const path = parts.reverse().join(".");
     return path;