diff --git a/src/main/java/com/norconex/commons/lang/bean/jackson/JsonXmlMapSerializer.java b/src/main/java/com/norconex/commons/lang/bean/jackson/JsonXmlMapSerializer.java
index 6e48c203..b478a7b5 100644
--- a/src/main/java/com/norconex/commons/lang/bean/jackson/JsonXmlMapSerializer.java
+++ b/src/main/java/com/norconex/commons/lang/bean/jackson/JsonXmlMapSerializer.java
@@ -42,12 +42,12 @@ public class JsonXmlMapSerializer<T extends Map<?, ?>>
 
     @SuppressWarnings("unchecked")
     public JsonXmlMapSerializer() {
-        super((Class<T>) Map.class);
+        super((Class<T>) (Class<?>) Map.class);
     }
 
     @SuppressWarnings("unchecked")
     private JsonXmlMapSerializer(BeanProperty currentProperty) {
-        super((Class<T>) Map.class);
+        super((Class<T>) (Class<?>) Map.class);
         this.currentProperty = currentProperty;
     }