diff --git a/modules/http_proxy/http_proxy_js_request.go b/modules/http_proxy/http_proxy_js_request.go
index c0ba9f26..563c9b33 100644
--- a/modules/http_proxy/http_proxy_js_request.go
+++ b/modules/http_proxy/http_proxy_js_request.go
@@ -117,6 +117,7 @@ func (j *JSRequest) CheckIfModifiedAndUpdateHash() bool {
 }
 
 func (j *JSRequest) GetHeader(name, deflt string) string {
+	name = strings.ToLower(name)
 	headers := strings.Split(j.Headers, "\r\n")
 	for i := 0; i < len(headers); i++ {
 		if headers[i] != "" {
@@ -124,7 +125,7 @@ func (j *JSRequest) GetHeader(name, deflt string) string {
 			if len(header_parts) != 0 && len(header_parts[0]) == 3 {
 				header_name := string(header_parts[0][1])
 				header_value := string(header_parts[0][2])
-				if strings.ToLower(name) == strings.ToLower(header_name) {
+				if name == strings.ToLower(header_name) {
 					return header_value
 				}
 			}