diff --git a/src/devices/screen.c b/src/devices/screen.c
index 6086d90..1b73fb7 100644
--- a/src/devices/screen.c
+++ b/src/devices/screen.c
@@ -64,11 +64,10 @@ static void
 screen_2bpp(Uint8 *layer, Uint8 *addr, Uint16 x1, Uint16 y1, Uint16 color, int fx, int fy)
 {
 	int row, w = uxn_screen.width, h = uxn_screen.height, opaque = (color % 5);
-	Uint8 *ch1 = addr, *ch2 = ch1 + 8;
 	Uint16 y, ymod = (fy < 0 ? 7 : 0), ymax = y1 + ymod + fy * 8;
 	Uint16 x, xmod = (fx > 0 ? 7 : 0), xmax = x1 + xmod - fx * 8;
 	for(y = y1 + ymod; y != ymax; y += fy) {
-		int c = *ch1++ | (*ch2++ << 8);
+		int c = *addr++ | (*(addr + 7) << 8);
 		if(y < h)
 			for(x = x1 + xmod, row = y * w; x != xmax; x -= fx, c >>= 1) {
 				Uint8 ch = (c & 1) | ((c >> 7) & 2);
@@ -82,11 +81,10 @@ static void
 screen_1bpp(Uint8 *layer, Uint8 *addr, Uint16 x1, Uint16 y1, Uint16 color, int fx, int fy)
 {
 	int row, w = uxn_screen.width, h = uxn_screen.height, opaque = (color % 5);
-	Uint8 *ch1 = addr;
 	Uint16 y, ymod = (fy < 0 ? 7 : 0), ymax = y1 + ymod + fy * 8;
 	Uint16 x, xmod = (fx > 0 ? 7 : 0), xmax = x1 + xmod - fx * 8;
 	for(y = y1 + ymod; y != ymax; y += fy) {
-		int c = *ch1++;
+		int c = *addr++;
 		if(y < h)
 			for(x = x1 + xmod, row = y * w; x != xmax; x -= fx, c >>= 1) {
 				Uint8 ch = c & 1;