diff --git a/source/core/rendering/sdl_manager.cpp b/source/core/rendering/sdl_manager.cpp
index a4d2bde..f0b1b32 100644
--- a/source/core/rendering/sdl_manager.cpp
+++ b/source/core/rendering/sdl_manager.cpp
@@ -277,11 +277,13 @@ auto SDLManager::handleWindowEvent(const SDL_Event& event) -> bool {
     if (event.type == SDL_EVENT_WINDOW_RESIZED) {
         SDL_GetWindowSize(finestra_, &current_width_, &current_height_);
 
-        float new_zoom = static_cast<float>(current_width_) / Defaults::Window::WIDTH;
-        zoom_factor_ = std::max(Defaults::Window::MIN_ZOOM,
-            std::min(new_zoom, max_zoom_));
-
+        // En fullscreen el zoom_factor_ no participa del viewport (aspect-fit
+        // sobre la mida física), així que el preservem amb el valor de
+        // windowed per no perdre'l en tornar a windowed.
         if (!is_fullscreen_) {
+            float new_zoom = static_cast<float>(current_width_) / Defaults::Window::WIDTH;
+            zoom_factor_ = std::max(Defaults::Window::MIN_ZOOM,
+                std::min(new_zoom, max_zoom_));
             windowed_width_ = current_width_;
             windowed_height_ = current_height_;
         }