diff --git a/libs/labelFile.py b/libs/labelFile.py
index 6b12e460..590e52f9 100644
--- a/libs/labelFile.py
+++ b/libs/labelFile.py
@@ -45,8 +45,10 @@ class LabelFile(object):
         for shape in shapes:
             points = shape['points']
             label = shape['label']
+            # Add Chris 
+            difficult = int(shape['difficult'])
             bndbox = LabelFile.convertPoints2BndBox(points)
-            writer.addBndBox(bndbox[0], bndbox[1], bndbox[2], bndbox[3], label)
+            writer.addBndBox(bndbox[0], bndbox[1], bndbox[2], bndbox[3], label, difficult)
 
         writer.save(targetFile=filename)
         return