diff --git a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
index 04fc6869d..17e9d0473 100644
--- a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
+++ b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
@@ -789,7 +789,7 @@ bool HTTPClient::sendHeader(const char * type) {
     header += "\r\n";
 
     if(!_useHTTP10) {
-        header += "Accept-Encoding: identity;q=1 chunked;q=0.1 *;q=0\r\n";
+        header += "Accept-Encoding: identity;q=1,chunked;q=0.1,*;q=0\r\n";
     }
 
     if(_base64Authorization.length()) {