diff --git a/src/devices/ppu.c b/src/devices/ppu.c
index 9dae9d9..1697c8f 100644
--- a/src/devices/ppu.c
+++ b/src/devices/ppu.c
@@ -77,6 +77,7 @@ ppu_clear(Ppu *p, Layer *layer)
 	layer->changed = 1;
 }
 
+#pragma weak ppu_redraw
 void
 ppu_redraw(Ppu *p, Uint32 *screen)
 {
diff --git a/src/devices/ppu.h b/src/devices/ppu.h
index 39848f6..9e5f217 100644
--- a/src/devices/ppu.h
+++ b/src/devices/ppu.h
@@ -22,8 +22,8 @@ typedef struct Layer {
 } Layer;
 
 typedef struct Ppu {
-	Uint16 width, height;
 	Uint32 palette[4];
+	Uint16 width, height;
 	Layer fg, bg;
 } Ppu;