diff --git a/helm-dash.el b/helm-dash.el
index f2204f4..176149d 100644
--- a/helm-dash.el
+++ b/helm-dash.el
@@ -326,8 +326,10 @@ If doesn't exist, it asks to create it."
   (when (helm-dash--ensure-created-docsets-path (helm-dash-docsets-path))
     (let ((feed-url (format "%s/%s.xml" helm-dash-docsets-url docset-name))
           (feed-tmp-path (format "%s%s-feed.xml" temporary-file-directory docset-name)))
-      (url-copy-file feed-url feed-tmp-path t)
-      (helm-dash--install-docset (helm-dash-get-docset-url feed-tmp-path) docset-name))))
+      (funcall (if (fboundp 'make-thread) 'make-thread 'funcall)
+               (lambda ()
+                 (url-copy-file feed-url feed-tmp-path t)
+                 (helm-dash--install-docset (helm-dash-get-docset-url feed-tmp-path) docset-name))))))
 
 ;;;###autoload
 (defun helm-dash-async-install-docset (docset-name)