diff --git a/lib/zin/wg/docapp/js/v1.js b/lib/zin/wg/docapp/js/v1.js
index 46c039861c..f4dedb10ec 100644
--- a/lib/zin/wg/docapp/js/v1.js
+++ b/lib/zin/wg/docapp/js/v1.js
@@ -1220,8 +1220,7 @@ const actionsMap =
         const lang         = getLang();
         const canEdit      = !isReadonly && privs.edit && (!doc.privs || doc.privs.edit !== false) && privs.editFile;
         const canDelete    = !isReadonly && privs.edit && (!doc.privs || doc.privs.edit !== false) && privs.deleteFile;
-        const hasExtension = file.title.lastIndexOf('.' + file.extension) == (file.title.length - file.extension.length - 1);
-        const canPreview   = hasExtension && canPreviewExtensions.split('|').includes(file.extension);
+        const canPreview   = canPreviewExtensions.split('|').includes(file.extension);
         return [
             canPreview ? {'data-toggle': 'modal', 'data-size': 'lg', url: $.createLink('file', 'download', `fileID=${file.id}&mouse=left`), hint: lang.filePreview, icon: 'eye'} : null,
             {target: '_blank', url: zui.formatString(docApp.props.fileUrl, file), hint: lang.fileDownload, icon: 'download'},