diff --git a/header.go b/header.go
index b6d8ffec92..4555412ef3 100644
--- a/header.go
+++ b/header.go
@@ -1473,7 +1473,7 @@ func (h *RequestHeader) setSpecialHeader(key, value []byte) bool {
 			return true
 		case caseInsensitiveCompare(strCookie, key):
 			h.collectCookies()
-			h.cookies = parseRequestCookies(h.cookies, value)
+			h.cookies = parseRequestCookies(make([]argsKV, 0), value)
 			return true
 		}
 	case 't':