diff --git a/glymur/jp2box.py b/glymur/jp2box.py
index 851ae3b..b2986ae 100644
--- a/glymur/jp2box.py
+++ b/glymur/jp2box.py
@@ -1241,8 +1241,10 @@ class FileTypeBox(Jp2kBox):
     def _validate(self, writing=False):
         """Validate the box before writing to file."""
         if self.brand not in ['jp2 ', 'jpx ']:
-            msg = "The file type brand must be either 'jp2 ' or 'jpx '."
-            self._dispatch_validation_error(msg, writing=writing)
+            msg = "The file type brand was '{0}'.  "
+            msg += "It should be either 'jp2 ' or 'jpx '."
+            self._dispatch_validation_error(msg.format(self.brand),
+                                            writing=writing)
         valid_cls = ['jp2 ', 'jpx ', 'jpxb']
         for item in self.compatibility_list:
             if item not in valid_cls:
diff --git a/glymur/test/test_jp2k.py b/glymur/test/test_jp2k.py
index 05d4ccc..aba1463 100644
--- a/glymur/test/test_jp2k.py
+++ b/glymur/test/test_jp2k.py
@@ -814,9 +814,9 @@ class TestJp2kOpjDataRootWarnings(unittest.TestCase):
         """Should warn in case of bad ftyp brand."""
         filename = opj_data_file('input/nonregression/edf_c2_1000290.jp2')
         with warnings.catch_warnings(record=True) as w:
-            warnings.simplefilter('always')
-            jp2 = Jp2k(filename)
-            self.assertTrue(issubclass(w[0].category, UserWarning))
+           warnings.simplefilter('always')
+           jp2 = Jp2k(filename)
+           self.assertTrue(issubclass(w[0].category, UserWarning))
 
     def test_invalid_approximation(self):
         """Should warn in case of invalid approximation."""