diff --git a/tools/cabana/signaledit.cc b/tools/cabana/signaledit.cc
index 7988037c34..0499b1be8a 100644
--- a/tools/cabana/signaledit.cc
+++ b/tools/cabana/signaledit.cc
@@ -449,3 +449,8 @@ void SignalView::signalHovered(const Signal *sig) {
     }
   }
 }
+
+void SignalView::leaveEvent(QEvent *event) {
+  emit highlight(nullptr);
+  QWidget::leaveEvent(event);
+}
diff --git a/tools/cabana/signaledit.h b/tools/cabana/signaledit.h
index 6a904e7328..c0b649209a 100644
--- a/tools/cabana/signaledit.h
+++ b/tools/cabana/signaledit.h
@@ -89,6 +89,7 @@ signals:
 
 private:
   void rowsChanged();
+  void leaveEvent(QEvent *event);
 
   QString msg_id;
   QTreeView *tree;