diff -r f30740c3aafb -r 4990147c58d0 src/server/daemon/httprequest.c
--- a/src/server/daemon/httprequest.c	Sat Jan 18 16:48:03 2020 +0100
+++ b/src/server/daemon/httprequest.c	Sun Jan 19 09:01:39 2020 +0100
@@ -945,7 +945,9 @@
     
     if(ret != REQ_PROCEED) {
         // default error handler
-        nsapi_error_request((Session*)sn, (Request*)rq);
+        if(!rq->rq.senthdrs) {
+            nsapi_error_request((Session*)sn, (Request*)rq);
+        }
     }
 
     return ret;