diff --git a/src/main/java/org/jdbdt/QueryBuilder.java b/src/main/java/org/jdbdt/QueryBuilder.java
index <HASH>..<HASH> 100644
--- a/src/main/java/org/jdbdt/QueryBuilder.java
+++ b/src/main/java/org/jdbdt/QueryBuilder.java
@@ -14,7 +14,7 @@ public final class QueryBuilder  {
   /**
    * Clauses/parameters that may be set for a builder.
    */
-  enum Param {
+  private enum Param {
     /** Columns (mandatory). */
     COLUMNS {
       @Override
QueryBuilder: Param enum can be private