diff --git a/tools/binman/entry.py b/tools/binman/entry.py
index e671a2e..ec3b22e 100644
--- a/tools/binman/entry.py
+++ b/tools/binman/entry.py
@@ -160,6 +160,9 @@ class Entry(object):
         self.align_end = fdt_util.GetInt(self._node, 'align-end')
         self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
 
+    def GetDefaultFilename(self):
+        return None
+
     def AddMissingProperties(self):
         """Add new properties to the device tree as needed for this entry"""
         for prop in ['offset', 'size', 'image-pos']:
diff --git a/tools/binman/entry_test.py b/tools/binman/entry_test.py
index 4100bcc..69d85b4 100644
--- a/tools/binman/entry_test.py
+++ b/tools/binman/entry_test.py
@@ -65,6 +65,11 @@ class TestEntry(unittest.TestCase):
         sub_entry = entry.Entry(None, None, sub_node, read_node=False)
         self.assertEqual('root.subnode', sub_entry.GetUniqueName())
 
+    def testGetDefaultFilename(self):
+        """Trivial test for this base class function"""
+        import entry
+        base_entry = entry.Entry(None, None, None, read_node=False)
+        self.assertIsNone(base_entry.GetDefaultFilename())
 
 if __name__ == "__main__":
     unittest.main()