diff --git a/libraries/ESP8266WiFi/src/ESP8266WiFi.h b/libraries/ESP8266WiFi/src/ESP8266WiFi.h
index 143d61cb5..4c1330b2e 100644
--- a/libraries/ESP8266WiFi/src/ESP8266WiFi.h
+++ b/libraries/ESP8266WiFi/src/ESP8266WiFi.h
@@ -31,6 +31,7 @@ extern "C" {
 #include "IPAddress.h"
 #include "WiFiClient.h"
 #include "WiFiServer.h"
+#include "WiFiClientSecure.h"
 
 #define WIFI_SCAN_RUNNING   (-1)
 #define WIFI_SCAN_FAILED     (-2)