diff --git a/src/platform/shared.c b/src/platform/shared.c
index 4361a35451..22a1977507 100644
--- a/src/platform/shared.c
+++ b/src/platform/shared.c
@@ -191,6 +191,7 @@ static void platform_resize(int width, int height)
 	rct_drawpixelinfo *screenDPI;
 	int newScreenBufferSize;
 	void *newScreenBuffer;
+	uint32 flags;
 
 	if (_surface != NULL)
 		SDL_FreeSurface(_surface);
@@ -247,6 +248,18 @@ static void platform_resize(int width, int height)
 	window_relocate_windows(width, height);
 
 	gfx_invalidate_screen();
+
+	// Check if the window has been resized in windowed mode and update the config file accordingly
+	// This is called in rct2_update_2 and is only called after resizing a window has finished
+	flags = SDL_GetWindowFlags(gWindow);
+	if ((flags & (SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED |
+		SDL_WINDOW_FULLSCREEN | SDL_WINDOW_FULLSCREEN_DESKTOP)) == 0) {
+		if (width != gConfigGeneral.window_width || height != gConfigGeneral.window_height) {
+			gConfigGeneral.window_width = width;
+			gConfigGeneral.window_height = height;
+			config_save_default();
+		}
+	}
 }
 
 void platform_update_palette(char* colours, int start_index, int num_colours)