diff --git a/classpath/java/lang/AssertionError.java b/classpath/java/lang/AssertionError.java
new file mode 100644
index 0000000000..ba5d2589e4
--- /dev/null
+++ b/classpath/java/lang/AssertionError.java
@@ -0,0 +1,45 @@
+/* Copyright (c) 2008, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+package java.lang;
+
+public class AssertionError extends Error {
+  public AssertionError() {
+    super("", null);
+  }
+
+  public AssertionError(boolean detailMessage) {
+    super(""+detailMessage, null);
+  }
+
+  public AssertionError(char detailMessage) {
+    super(""+detailMessage, null);
+  }
+
+  public AssertionError(double detailMessage) {
+    super(""+detailMessage, null);
+  }
+
+  public AssertionError(float detailMessage) {
+    super(""+detailMessage, null);
+  }
+
+  public AssertionError(int detailMessage) {
+    super(""+detailMessage, null);
+  }
+
+  public AssertionError(long detailMessage) {
+    super(""+detailMessage, null);
+  }
+
+  public AssertionError(Object detailMessage) {
+    super(""+detailMessage, null);
+  }
+}