diff --git a/script.coffee b/script.coffee
index 9ad0da2c1..91a590adb 100644
--- a/script.coffee
+++ b/script.coffee
@@ -2638,7 +2638,7 @@ imgGif =
   node: (root) ->
     return if root.hidden or !thumb = $ 'img[md5]', root
     src = thumb.parentNode.href
-    if /gif$/.test src
+    if /gif$/.test src and !/^Spoiler/.test thumb.alt
       thumb.src = src
 
 imgExpand =