diff --git a/request.zp b/request.zp
index 4bda328..e576653 100644
--- a/request.zp
+++ b/request.zp
@@ -11,7 +11,7 @@
     (list "delete" delete))
 
   (BSIZE (make-small 1024))
-  (DFLT-HEADERS (make-hash "User-Agent" (++ "zepto-" (zepto:version-str))))
+  (DFLT-HEADERS (make-hash "User-Agent" (++ "zepto-" zepto:version-str)))
   (FOLLOW-REDIRECTS #f)
 
   (set-buffer-size (lambda (nsize)