diff --git a/javascript/manga/src/all/comick.js b/javascript/manga/src/all/comick.js
index a71dfc35..1fe9ab47 100644
--- a/javascript/manga/src/all/comick.js
+++ b/javascript/manga/src/all/comick.js
@@ -146,7 +146,7 @@ class DefaultExtension extends MProvider {
                 title = chapter.title;
             }
 
-            if (chapter.group_name !== "null") {
+            if (chapter.group_name && chapter.group_name !== "null") {
                 scanlator = chapter.group_name
                     .toString()
                     .replace(/]/g, "")