diff --git a/core/src/main/java/io/github/mmm/base/io/AppendableWriter.java b/core/src/main/java/io/github/mmm/base/io/AppendableWriter.java
index 4b0f76b..43689a7 100644
--- a/core/src/main/java/io/github/mmm/base/io/AppendableWriter.java
+++ b/core/src/main/java/io/github/mmm/base/io/AppendableWriter.java
@@ -19,6 +19,14 @@ public class AppendableWriter extends Writer {
   /** The delegate. */
   private final Appendable appendable;
 
+  /**
+   * The constructor.
+   */
+  public AppendableWriter() {
+
+    this(new StringBuilder());
+  }
+
   /**
    * The constructor.
    *