diff --git a/modules/lib/api/caching.xql b/modules/lib/api/caching.xql
index b4c8d6d0..4300e586 100644
--- a/modules/lib/api/caching.xql
+++ b/modules/lib/api/caching.xql
@@ -37,7 +37,7 @@ declare function cutil:check-last-modified($request as map(*), $nodes as node()*
             then (response:set-header("Last-Modified", cutil:format-http-date(head($lastModified)))) 
             else (),        
             if ($shouldReturn304) then
-                router:response(304, "", "")
+                router:response(304, "")
             else
                 $callback($request, $nodes)
         )