diff --git a/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp b/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
index 5c413b959..a01abf416 100644
--- a/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
+++ b/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
@@ -404,7 +404,7 @@ bool ESP8266WebServer::hasArg(String  name) {
 }
 
 
-String ESP8266WebServer::header(const char* name) {
+String ESP8266WebServer::header(String name) {
   for (int i = 0; i < _headerKeysCount; ++i) {
     if (_currentHeaders[i].key == name)
       return _currentHeaders[i].value;
diff --git a/libraries/ESP8266WebServer/src/ESP8266WebServer.h b/libraries/ESP8266WebServer/src/ESP8266WebServer.h
index 6d0007aab..4e291e5fb 100644
--- a/libraries/ESP8266WebServer/src/ESP8266WebServer.h
+++ b/libraries/ESP8266WebServer/src/ESP8266WebServer.h
@@ -93,7 +93,7 @@ public:
   int args();                     // get arguments count
   bool hasArg(String name);       // check if argument exists
   void collectHeaders(const char* headerKeys[], const size_t headerKeysCount); // set the request headers to collect
-  String header(const char* name);   // get request header value by name
+  String header(String name);      // get request header value by name
   String header(int i);              // get request header value by number
   String headerName(int i);          // get request header name by number
   int headers();                     // get header count