diff --git a/tools/cabana/signalview.cc b/tools/cabana/signalview.cc
index f404dd334..4775f36aa 100644
--- a/tools/cabana/signalview.cc
+++ b/tools/cabana/signalview.cc
@@ -5,6 +5,7 @@
 #include <QDialogButtonBox>
 #include <QHBoxLayout>
 #include <QHeaderView>
+#include <QHelpEvent>
 #include <QMessageBox>
 #include <QPainter>
 #include <QPushButton>