diff --git a/src/map/gmifile.cpp b/src/map/gmifile.cpp
index aeb5d80b..55608d8a 100644
--- a/src/map/gmifile.cpp
+++ b/src/map/gmifile.cpp
@@ -1,3 +1,4 @@
+#include <QIODevice>
 #include "gmifile.h"
 
 static CalibrationPoint calibrationPoint(const QByteArray line)