diff --git a/runtime/LogWindow.cpp b/runtime/LogWindow.cpp
index 09f0b3cf0..250070a03 100644
--- a/runtime/LogWindow.cpp
+++ b/runtime/LogWindow.cpp
@@ -14,6 +14,7 @@
 
 #include <QTime>
 
+#include <stdio.h>
 
 LogWindow::LogWindow(QWidget *parent, QString logFile) :
     QDialog(parent),