diff --git a/glymur/jp2box.py b/glymur/jp2box.py
index 5b3d046..df9a3a0 100644
--- a/glymur/jp2box.py
+++ b/glymur/jp2box.py
@@ -73,7 +73,7 @@ class Jp2kBox(object):
         self.offset = offset
         self.longname = longname
 
-        # should never be used except for last box in file.
+        # should never be used except maybe for last box in file.
         self._file_size = -1
 
     def __str__(self):
diff --git a/glymur/jp2k.py b/glymur/jp2k.py
index 50801f4..88a8336 100644
--- a/glymur/jp2k.py
+++ b/glymur/jp2k.py
@@ -118,9 +118,8 @@ class Jp2k(Jp2kBox):
         IOError
             The file was not JPEG 2000.
         """
-        stat = os.stat(self.filename)
-        self.length = stat.st_size
-        self._file_size = stat.st_size
+        self.length = os.path.getsize(self.filename)
+        self._file_size = os.path.getsize(self.filename)
 
         with open(self.filename, 'rb') as fptr: