diff --git a/seahub/views/file.py b/seahub/views/file.py
index c535f0f6ba..61089096a7 100644
--- a/seahub/views/file.py
+++ b/seahub/views/file.py
@@ -294,7 +294,7 @@ def view_file(request, repo_id):
             filesizeformat(FILE_PREVIEW_MAX_SIZE)
         ret_dict['err'] = err
 
-    elif filetype in (DOCUMENT, PDF) and fsize > OFFICE_PREVIEW_MAX_SIZE:
+    elif filetype in (DOCUMENT, PDF) and HAS_OFFICE_CONVERTER and fsize > OFFICE_PREVIEW_MAX_SIZE:
         err = _(u'File size surpasses %s, can not be opened online.') % \
             filesizeformat(OFFICE_PREVIEW_MAX_SIZE)
         ret_dict['err'] = err
@@ -465,7 +465,7 @@ def view_history_file_common(request, repo_id, ret_dict):
                 filesizeformat(FILE_PREVIEW_MAX_SIZE)
             ret_dict['err'] = err
 
-        elif filetype in (DOCUMENT, PDF) and fsize > OFFICE_PREVIEW_MAX_SIZE:
+        elif filetype in (DOCUMENT, PDF) and HAS_OFFICE_CONVERTER and fsize > OFFICE_PREVIEW_MAX_SIZE:
             err = _(u'File size surpasses %s, can not be opened online.') % \
                 filesizeformat(OFFICE_PREVIEW_MAX_SIZE)
             ret_dict['err'] = err
@@ -767,4 +767,4 @@ def office_convert_query_page_num(request):
             logging.exception('failed to call query_office_file_pages');
             ret['error'] = str(e)
             
-    return HttpResponse(json.dumps(ret), content_type=content_type)
\ No newline at end of file
+    return HttpResponse(json.dumps(ret), content_type=content_type)