diff --git a/DevTools/HackStudio/Editor.cpp b/DevTools/HackStudio/Editor.cpp
index e81fac3860..275fe3cdf5 100644
--- a/DevTools/HackStudio/Editor.cpp
+++ b/DevTools/HackStudio/Editor.cpp
@@ -48,6 +48,7 @@ namespace HackStudio {
 
 Editor::Editor()
 {
+    set_document(CodeDocument::create());
     m_documentation_tooltip_window = GUI::Window::construct();
     m_documentation_tooltip_window->set_rect(0, 0, 500, 400);
     m_documentation_tooltip_window->set_window_type(GUI::WindowType::Tooltip);