1 files changed, 1 insertions, 1 deletions
diff --git a/lib/exe/ajax.php b/lib/exe/ajax.php
index 1000094bc..a200a3ded 100644
--- a/lib/exe/ajax.php
+++ b/lib/exe/ajax.php
@@ -254,7 +254,7 @@ function ajax_mediadiff(){
 
     $image = '';
     if ($INPUT->has('image')) $image = cleanID($INPUT->str('image'));
-    $NS = $INPUT->post->str('ns');
+    $NS = getNS($image);
     $auth = auth_quickaclcheck("$NS:*");
     media_diff($image, $NS, $auth, true);
 }