diff --git a/src/gui/pSpinBox.cpp b/src/gui/pSpinBox.cpp
index cd0b7de..113b61e 100644
--- a/src/gui/pSpinBox.cpp
+++ b/src/gui/pSpinBox.cpp
@@ -26,6 +26,7 @@
 #include "pSpinBox.h"
 #include "ui_pSpinBox.h"
 
+#include <QFrame>
 #include <QSlider>
 
 class Slider : public QSlider