diff --git a/ground/openpilotgcs/src/plugins/setupwizard/pages/esccalibrationpage.h b/ground/openpilotgcs/src/plugins/setupwizard/pages/esccalibrationpage.h
index 6f4657fab..f6217e8a9 100644
--- a/ground/openpilotgcs/src/plugins/setupwizard/pages/esccalibrationpage.h
+++ b/ground/openpilotgcs/src/plugins/setupwizard/pages/esccalibrationpage.h
@@ -49,8 +49,8 @@ private slots:
     void enableButtons(bool enable);
 
 private:
-    const int LOW_PWM_OUTPUT_PULSE_LENGTH_MICROSECONDS  = 1000;
-    const int HIGH_PWM_OUTPUT_PULSE_LENGTH_MICROSECONDS = 2000;
+    static const int LOW_PWM_OUTPUT_PULSE_LENGTH_MICROSECONDS  = 1000;
+    static const int HIGH_PWM_OUTPUT_PULSE_LENGTH_MICROSECONDS = 2000;
     Ui::EscCalibrationPage *ui;
     bool m_isCalibrating;