diff --git a/src/messages/MessageBuilder.cpp b/src/messages/MessageBuilder.cpp
index 0b40163c5..6f18b13cb 100644
--- a/src/messages/MessageBuilder.cpp
+++ b/src/messages/MessageBuilder.cpp
@@ -53,6 +53,7 @@
 #include <QDateTime>
 #include <QDebug>
 #include <QFileInfo>
+#include <QStringBuilder>
 #include <QTimeZone>
 
 #include <algorithm>