diff --git a/Application/Common/Common/function.php b/Application/Common/Common/function.php
index 3347c675a..c87284739 100644
--- a/Application/Common/Common/function.php
+++ b/Application/Common/Common/function.php
@@ -1011,7 +1011,7 @@ function get_cover($cover_id, $field = null, $root = 1, $flag = true)
         if (!empty($picture['oss_url'])) {
             return str_replace('http:', 'https:', $picture['oss_url']);
         } else {
-            return '//' . $_SERVER['HTTP_HOST'] . __ROOT__ . $picture['path'];
+            return 'https://' . $_SERVER['HTTP_HOST'] . __ROOT__ . $picture['path'];
         }
     } elseif (get_tool_status("qiniu_storage") == 1) {
         if (!empty($picture['url'])) {