diff --git a/apps/files_versions/js/versions.js b/apps/files_versions/js/versions.js
index 87396cd0ba..07c5655560 100644
--- a/apps/files_versions/js/versions.js
+++ b/apps/files_versions/js/versions.js
@@ -45,7 +45,7 @@ function createVersionsDropdown(filename, files) {
 
 	var historyUrl = OC.linkTo('files_versions', 'history.php') + '?path='+encodeURIComponent( $( '#dir' ).val() ).replace( /%2F/g, '/' )+'/'+encodeURIComponent( filename );
 
-	var html = '<div id="dropdown" class="drop drop-versions" data-file="'+files+'">';
+	var html = '<div id="dropdown" class="drop drop-versions" data-file="'+escapeHTML(files)+'">';
 	html += '<div id="private">';
 	html += '<select data-placeholder="Saved versions" id="found_versions" class="chzen-select" style="width:16em;">';
 	html += '<option value=""></option>';