diff --git a/viewer/JFJochImageReadingWorker.h b/viewer/JFJochImageReadingWorker.h
index 5513aca9..67e21faa 100644
--- a/viewer/JFJochImageReadingWorker.h
+++ b/viewer/JFJochImageReadingWorker.h
@@ -10,6 +10,7 @@
 #include <QRect>
 #include <QMutex>
 #include <QTimer>
+#include <QElapsedTimer>
 
 #include "../reader/JFJochHDF5Reader.h"
 #include "../common/Logger.h"