diff --git a/src/LabelsAligner.h b/src/LabelsAligner.h
index c3954ebc0fcbd4acdffe1c1744fa30aa252e4a19..b20a4ed997f4fe048fd9851fb8aa7e4a2c6dccf5 100644
--- a/src/LabelsAligner.h
+++ b/src/LabelsAligner.h
@@ -22,6 +22,7 @@
 #define LABELSALIGNER_H
 
 #include <QObject>
+#include <QVector>
 
 class QWidget;
 class QGridLayout;