diff --git a/js/file-selector.js b/js/file-selector.js
index dbe8ea824..687920d08 100644
--- a/js/file-selector.js
+++ b/js/file-selector.js
@@ -5,7 +5,7 @@
  *   $config['additional_javascript'][] = 'js/jquery.min.js';
  *   $config['additional_javascript'][] = 'js/file-selector.js';
  */
-function init_file_selector() {
+function init_file_selector(max_images) {
 
 $(document).ready(function () {
 	// add options panel item
@@ -20,7 +20,7 @@ $(document).ready(function () {
 			}
 		});
 
-		if (localStorage.file_dragdrop === 'undefined') localStorage.file_dragdrop = 'true';
+		if (typeof localStorage.file_dragdrop === 'undefined') localStorage.file_dragdrop = 'true';
 		if (localStorage.file_dragdrop === 'true') $('#file-drag-drop>input').prop('checked', true);
 	}
 });
diff --git a/templates/post_form.html b/templates/post_form.html
index 7cdcc7d34..00390daf3 100644
--- a/templates/post_form.html
+++ b/templates/post_form.html
@@ -106,7 +106,7 @@
 					</div>
 				</div>
 
-				<script type="text/javascript">if (typeof init_file_selector !== 'undefined') init_file_selector();</script>
+				<script type="text/javascript">if (typeof init_file_selector !== 'undefined') init_file_selector({{ config.max_images }});</script>
 
 				{% if config.allow_upload_by_url %}
 					<div style="float:none;text-align:left" id="upload_url">