diff --git a/app/iwiviewer.h b/app/iwiviewer.h
index 86f5105..f83982f 100644
--- a/app/iwiviewer.h
+++ b/app/iwiviewer.h
@@ -1,27 +1,27 @@
-#ifndef IWIVIEWER_H
-#define IWIVIEWER_H
-
-#include "iwifile.h"
-#include <QWidget>
-
-namespace Ui {
-class IWIViewer;
-}
-
-class IWIViewer : public QWidget
-{
-    Q_OBJECT
-
-public:
-    explicit IWIViewer(QWidget *parent = nullptr);
-    ~IWIViewer();
-
-    void MipmapIndexChanged(int aMipmapIndex);
-
-    void SetIWIFile(std::shared_ptr<IWIFile> aIWIFile);
-private:
-    Ui::IWIViewer *ui;
-    std::shared_ptr<IWIFile> mIWIFile;
-};
-
-#endif // IWIVIEWER_H
+#ifndef IWIVIEWER_H
+#define IWIVIEWER_H
+
+#include "iwifile.h"
+#include <QWidget>
+
+namespace Ui {
+class IWIViewer;
+}
+
+class IWIViewer : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit IWIViewer(QWidget *parent = nullptr);
+    ~IWIViewer();
+
+    void MipmapIndexChanged(int aMipmapIndex);
+
+    void SetIWIFile(const IWIFile *aIWIFile);
+private:
+    Ui::IWIViewer *ui;
+    const IWIFile* mIWIFile;
+};
+
+#endif // IWIVIEWER_H