diff --git a/src/processor/gpu.rs b/src/processor/gpu.rs
index 61eb6a7..045df97 100644
--- a/src/processor/gpu.rs
+++ b/src/processor/gpu.rs
@@ -289,6 +289,11 @@ impl CPU {
             if lcdc.window_enable {
                 self.render_scanline_window(scanline, lcdc, palette);
             }
+        } else {
+            for x in 0..WIDTH {
+                self.gpu.buffer[(scanline as usize * WIDTH) + x] =
+                    Colour::from_u8_rgb(255, 255, 255);
+            }
         }
         if lcdc.obj_enable {
             self.render_scanline_obj(scanline, lcdc);