diff --git a/signup.go b/signup.go
index 8043d3e..f093445 100644
--- a/signup.go
+++ b/signup.go
@@ -68,7 +68,7 @@ func handler2(w http.ResponseWriter, r *http.Request) {
 	for name, headers := range r.Header {
 		log.Println("handler2() name =", name)
 		log.Println("handler2() headers =", headers)
-		name = strings.ToLower(name)
+		name = strings.(name)
 		for _, h := range headers {
 			log.Println("handler2() h =", h)