diff --git a/gui/wind/IPC.cpp b/gui/wind/IPC.cpp
index b22af6fb..99f739cb 100644
--- a/gui/wind/IPC.cpp
+++ b/gui/wind/IPC.cpp
@@ -2,7 +2,7 @@
 #include "Mouse.h"
 #include "Screen.h"
 #include <luna/Alignment.h>
-#include <luna/String.h>
+#include <luna/RefString.h>
 #include <os/File.h>
 #include <os/SharedMemory.h>
 #include <sys/mman.h>
@@ -35,9 +35,9 @@ static Result<void> handle_create_window_message(Client& client)
 
     request.rect = request.rect.normalized();
 
-    auto name = TRY_OR_IPC_ERROR(String::from_cstring("Window"));
+    auto name = TRY_OR_IPC_ERROR(RefString::from_cstring("Window"));
 
-    auto shm_path = TRY_OR_IPC_ERROR(String::format("/wind-shm-%d-%lu"_sv, client.conn->fd(), time(NULL)));
+    auto shm_path = TRY_OR_IPC_ERROR(RefString::format("/wind-shm-%d-%lu"_sv, client.conn->fd(), time(NULL)));
 
     auto* window = new (std::nothrow) Window(request.rect, move(name));
     if (!window)
@@ -88,7 +88,7 @@ static Result<void> handle_set_window_title_message(Client& client)
     ui::SetWindowTitleRequest request;
     if (!TRY(client.conn->read_message(request))) return {};
 
-    auto name = COPY_IPC_STRING(request.title);
+    auto name = TRY(RefString::from_string(COPY_IPC_STRING(request.title)));
 
     os::println("wind: SetWindowTitle(\"%s\") for window %d", name.chars(), request.window);
 
diff --git a/gui/wind/Window.cpp b/gui/wind/Window.cpp
index 12463057..ae5f6d57 100644
--- a/gui/wind/Window.cpp
+++ b/gui/wind/Window.cpp
@@ -22,7 +22,7 @@ void Window::focus()
     g_windows.append(this);
 }
 
-Window::Window(ui::Rect r, String&& n) : surface(r), name(move(n))
+Window::Window(ui::Rect r, RefString&& n) : surface(r), name(move(n))
 {
     auto font = ui::Font::default_font();
     titlebar = ui::Rect { 0, 0, 0, 0 };
diff --git a/gui/wind/Window.h b/gui/wind/Window.h
index 8b9aac92..67cd37ec 100644
--- a/gui/wind/Window.h
+++ b/gui/wind/Window.h
@@ -1,6 +1,6 @@
 #pragma once
 #include <luna/LinkedList.h>
-#include <luna/String.h>
+#include <luna/RefString.h>
 #include <ui/Canvas.h>
 #include <ui/Color.h>
 #include <ui/Rect.h>
@@ -13,14 +13,14 @@ struct Window : public LinkedListNode<Window>
     ui::Rect surface;
     ui::Rect titlebar;
     u32* pixels;
-    String name;
-    String shm_path;
+    RefString name;
+    RefString shm_path;
     bool dirty { false };
     Client* client;
     int id;
     ui::WindowAttributes attributes { 0 };
 
-    Window(ui::Rect, String&&);
+    Window(ui::Rect, RefString&&);
     ~Window();
 
     void focus();