diff --git a/LibGUI/GDialog.h b/LibGUI/GDialog.h
index 85227797f2..007f07cc59 100644
--- a/LibGUI/GDialog.h
+++ b/LibGUI/GDialog.h
@@ -14,6 +14,8 @@ public:
     int result() const { return m_result; }
     void done(int result);
 
+    virtual const char* class_name() const override { return "GDialog"; }
+
 protected:
     explicit GDialog(CObject* parent);
 
diff --git a/LibGUI/GFilePicker.h b/LibGUI/GFilePicker.h
index c223bb7901..5e1c830ba6 100644
--- a/LibGUI/GFilePicker.h
+++ b/LibGUI/GFilePicker.h
@@ -1,6 +1,6 @@
-#include <LibGUI/GWindow.h>
+#include <LibGUI/GDialog.h>
 
-class GFilePicker final : public GWindow {
+class GFilePicker final : public GDialog {
 public:
     GFilePicker();
     virtual ~GFilePicker() override;
diff --git a/LibGUI/GInputBox.h b/LibGUI/GInputBox.h
index e5b70c1591..94de894040 100644
--- a/LibGUI/GInputBox.h
+++ b/LibGUI/GInputBox.h
@@ -12,6 +12,8 @@ public:
 
     String text_value() const { return m_text_value; }
 
+    virtual const char* class_name() const override { return "GInputBox"; }
+
 private:
     void build();
     String m_prompt;
diff --git a/LibGUI/GMessageBox.h b/LibGUI/GMessageBox.h
index 352079c7a6..5ccfcc46aa 100644
--- a/LibGUI/GMessageBox.h
+++ b/LibGUI/GMessageBox.h
@@ -16,6 +16,8 @@ public:
 
     static void show(const String& text, const String& title, Type type = Type::None, CObject* parent = nullptr);
 
+    virtual const char* class_name() const override { return "GMessageBox"; }
+
 private:
     void build();
     RetainPtr<GraphicsBitmap> icon() const;