diff --git a/src/network-web/oauth2service.cpp b/src/network-web/oauth2service.cpp
index 251d643c6..696c8da03 100755
--- a/src/network-web/oauth2service.cpp
+++ b/src/network-web/oauth2service.cpp
@@ -37,6 +37,8 @@
 Q_GLOBAL_STATIC(OAuthHttpHandler, qz_silent_acmanager)
 #endif
 
+#include <cstdlib>
+
 #include <QDebug>
 #include <QJsonDocument>
 #include <QJsonObject>