diff --git a/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp b/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp
index 997fe5ccb..f141a0909 100644
--- a/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp
+++ b/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp
@@ -29,7 +29,6 @@ extern "C"
 }
 #include <errno.h>
 #include "debug.h"
-#include "cbuf.h"
 #include "ESP8266WiFi.h"
 #include "WiFiClientSecure.h"
 #include "WiFiClient.h"