diff --git a/nucleus/payara-modules/nucleus-microprofile/config-service/src/main/java/fish/payara/nucleus/microprofile/config/spi/InjectedPayaraConfig.java b/nucleus/payara-modules/nucleus-microprofile/config-service/src/main/java/fish/payara/nucleus/microprofile/config/spi/InjectedPayaraConfig.java
index 8272e7e8cbb..6737d3e50fa 100644
--- a/nucleus/payara-modules/nucleus-microprofile/config-service/src/main/java/fish/payara/nucleus/microprofile/config/spi/InjectedPayaraConfig.java
+++ b/nucleus/payara-modules/nucleus-microprofile/config-service/src/main/java/fish/payara/nucleus/microprofile/config/spi/InjectedPayaraConfig.java
@@ -1,7 +1,7 @@
 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
- * Copyright (c) 2017 Payara Foundation and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017-2018 Payara Foundation and/or its affiliates. All rights reserved.
  *
  * The contents of this file are subject to the terms of either the GNU
  * General Public License Version 2 only ("GPL") or the Common Development
@@ -71,7 +71,8 @@ public <T> Optional<T> getOptionalValue(String propertyName, Class<T> propertyTy
 
     @Override
     public Iterable<String> getPropertyNames() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+        ensureDelegate();
+        return delegate.getPropertyNames();
     }
 
     @Override