diff --git a/app/mainwindow.cpp b/app/mainwindow.cpp
index 4ff9d36..aa31bf5 100644
--- a/app/mainwindow.cpp
+++ b/app/mainwindow.cpp
@@ -326,6 +326,7 @@ void MainWindow::ViewSIFile()
     std::unique_ptr<Interleaf> temp = std::make_unique<Interleaf>();
     if (OpenInterleafFileInternal(this, temp.get(), s)) {
       SIViewDialog *v = new SIViewDialog(temp->GetInformation(), this);
+      v->SetSubtitle(QFileInfo(s).fileName());
       v->temp = std::move(temp);
       v->setAttribute(Qt::WA_DeleteOnClose);
       v->show();
diff --git a/app/siview/siview.cpp b/app/siview/siview.cpp
index c0c4768..341d23a 100644
--- a/app/siview/siview.cpp
+++ b/app/siview/siview.cpp
@@ -13,8 +13,6 @@ SIViewDialog::SIViewDialog(Info *riff, QWidget *parent) :
   root_(riff),
   last_set_data_(nullptr)
 {
-  setWindowTitle(tr("View SI File"));
-
   auto layout = new QVBoxLayout(this);
 
   auto splitter = new QSplitter();
@@ -35,6 +33,19 @@ SIViewDialog::SIViewDialog(Info *riff, QWidget *parent) :
   config_stack_->addWidget(panel_);
 
   splitter->setSizes({99999, 99999});
+
+  SetSubtitle(QString());
+}
+
+void SIViewDialog::SetSubtitle(const QString &s)
+{
+  QString t;
+  if (s.isEmpty()) {
+    t = tr("View SI File");
+  } else {
+    t = tr("View SI File: %1").arg(s);
+  }
+  setWindowTitle(t);
 }
 
 void SIViewDialog::SelectionChanged(const QModelIndex &index)
diff --git a/app/siview/siview.h b/app/siview/siview.h
index 229888c..5b95514 100644
--- a/app/siview/siview.h
+++ b/app/siview/siview.h
@@ -14,6 +14,8 @@ class SIViewDialog : public QWidget
 public:
   SIViewDialog(si::Info *info, QWidget *parent = nullptr);
 
+  void SetSubtitle(const QString &s);
+
   std::unique_ptr<si::Interleaf> temp;
 
 private: