diff --git a/tests/device/test_http_client/test_http_client.ino b/tests/device/test_http_client/test_http_client.ino
index 12aefd2b54..8d6692cbb0 100644
--- a/tests/device/test_http_client/test_http_client.ino
+++ b/tests/device/test_http_client/test_http_client.ino
@@ -1,6 +1,7 @@
 #include <Arduino.h>
 #include <ESP8266WiFi.h>
 #include <ESP8266HTTPClient.h>
+#include <WiFiClientSecureAxTLS.h>
 #include <BSTest.h>
 #include <pgmspace.h>