diff --git a/bundles/org.openhab.binding.denonmarantz/src/main/java/org/openhab/binding/denonmarantz/internal/connector/http/DenonMarantzHttpConnector.java b/bundles/org.openhab.binding.denonmarantz/src/main/java/org/openhab/binding/denonmarantz/internal/connector/http/DenonMarantzHttpConnector.java
index 31fa274cc..57a4593a7 100644
--- a/bundles/org.openhab.binding.denonmarantz/src/main/java/org/openhab/binding/denonmarantz/internal/connector/http/DenonMarantzHttpConnector.java
+++ b/bundles/org.openhab.binding.denonmarantz/src/main/java/org/openhab/binding/denonmarantz/internal/connector/http/DenonMarantzHttpConnector.java
@@ -364,12 +364,12 @@ public class DenonMarantzHttpConnector extends DenonMarantzConnector {
 
         @Override
         public String getAttributeLocalName(int index) {
-            return Introspector.decapitalize(super.getAttributeLocalName(index));
+            return Introspector.decapitalize(super.getAttributeLocalName(index)).intern();
         }
 
         @Override
         public String getLocalName() {
-            return Introspector.decapitalize(super.getLocalName());
+            return Introspector.decapitalize(super.getLocalName()).intern();
         }
     }
 }