diff --git a/src/smtp.cpp b/src/smtp.cpp
index 811599233..51dc07a19 100644
--- a/src/smtp.cpp
+++ b/src/smtp.cpp
@@ -12,6 +12,7 @@
 
 #include <QTextStream>
 #include <QTcpSocket>
+#include <QDebug>
 
 Smtp::Smtp(const QString &from, const QString &to, const QString &subject, const QString &body) {
   socket = new QTcpSocket(this);