diff --git a/classpath/java/io/FilenameFilter.java b/classpath/java/io/FilenameFilter.java
new file mode 100644
index 0000000000..718f3973d8
--- /dev/null
+++ b/classpath/java/io/FilenameFilter.java
@@ -0,0 +1,17 @@
+/* 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.io;
+
+public interface FilenameFilter {
+
+  boolean accept(File dir, String name);
+
+}