diff --git a/Lib/foo.c b/Lib/foo.c
index c492e0f..d7eebc4 100644
--- a/Lib/foo.c
+++ b/Lib/foo.c
@@ -15,9 +15,11 @@
  *		ix, iy:	coordinate of the pixel in this pic.
  *		op, ox, oy : same things for output picture
  */
-#define PIXEL_COPY(ip, ix, iy, op, ox, oy)	\
-			do {			\
-						\
+#define PIXEL_COPY(ip, ix, iy, op, ox, oy)			\
+			do {					\
+			op->Rpix[oy][x] = ip->Rpix[y][x];	\
+			op->Gpix[oy][x] = ip->Gpix[y][x];	\
+			op->Bpix[oy][x] = ip->Bpix[y][x];	\
 			} while (0)
 
 #define SZPIC   5777