this in ctors
diff --git a/src/main/java/org/apache/commons/configuration2/DataConfiguration.java b/src/main/java/org/apache/commons/configuration2/DataConfiguration.java
index 574256f..909267b 100644
--- a/src/main/java/org/apache/commons/configuration2/DataConfiguration.java
+++ b/src/main/java/org/apache/commons/configuration2/DataConfiguration.java
@@ -146,7 +146,7 @@
      */
     public DataConfiguration(final Configuration configuration) {
         this.configuration = configuration;
-        dataConversionHandler = new DataConversionHandler();
+        this.dataConversionHandler = new DataConversionHandler();
     }
 
     /**