diff --git a/salt/states/file.py b/salt/states/file.py
index 2630eb1fff..432f4639f6 100644
--- a/salt/states/file.py
+++ b/salt/states/file.py
@@ -1452,6 +1452,8 @@ def managed(name,
             if ret['pchanges']:
                 ret['result'] = None
                 ret['comment'] = 'The file {0} is set to be changed'.format(name)
+                if show_diff:
+                    ret['changes']['diff'] = ret['pchanges']['diff']
             else:
                 ret['result'] = True
                 ret['comment'] = 'The file {0} is in the correct state'.format(name)