diff --git a/lib/pure/asynchttpserver.nim b/lib/pure/asynchttpserver.nim
index aa7d458b34..5d74896bf5 100644
--- a/lib/pure/asynchttpserver.nim
+++ b/lib/pure/asynchttpserver.nim
@@ -67,6 +67,12 @@ type
     Http409 = "409 Conflict",
     Http410 = "410 Gone",
     Http411 = "411 Length Required",
+    Http412 = "412 Precondition Failed",
+    Http413 = "413 Request Entity Too Large",
+    Http414 = "414 Request-URI Too Long",
+    Http415 = "415 Unsupported Media Type",
+    Http416 = "416 Requested Range Not Satisfiable",
+    Http417 = "417 Expectation Failed",
     Http418 = "418 I'm a teapot",
     Http500 = "500 Internal Server Error",
     Http501 = "501 Not Implemented",