diff --git a/src/Posting/QR.coffee b/src/Posting/QR.coffee
index 75b9d91a4..d590b8d8e 100644
--- a/src/Posting/QR.coffee
+++ b/src/Posting/QR.coffee
@@ -494,10 +494,10 @@ QR =
     QR.max_width  = +match_max?[1] or 10000
     QR.max_height = +match_max?[2] or 10000
 
-    nodes.fileInput.max = $('input[name=MAX_FILE_SIZE]')?.value or '0'
+    QR.max_size = +($('input[name=MAX_FILE_SIZE]')?.value or '0')
 
     scriptData = Get.scriptData()
-    QR.max_size_video = if (m = scriptData.match /\bmaxWebmFilesize *= *(\d+)\b/) then +m[1] else +nodes.fileInput.max
+    QR.max_size_video = if (m = scriptData.match /\bmaxWebmFilesize *= *(\d+)\b/) then +m[1] else QR.max_size
     QR.max_comment    = if (m = scriptData.match /\bcomlen *= *(\d+)\b/)          then +m[1] else 2000
 
     QR.max_width_video = QR.max_height_video = 2048
diff --git a/src/Posting/QR.post.coffee b/src/Posting/QR.post.coffee
index 6e1552b54..7d1bcb49f 100644
--- a/src/Posting/QR.post.coffee
+++ b/src/Posting/QR.post.coffee
@@ -202,7 +202,7 @@ QR.post = class
       @readFile()
 
   checkSize: ->
-    max = QR.nodes.fileInput.max
+    max = QR.max_size
     max = Math.min(max, QR.max_size_video) if /^video\//.test @file.type
     if @file.size > max
       @fileError "File too large (file: #{@filesize}, max: #{$.bytesToString max})."