diff --git a/sprite-optimizer.py b/sprite-optimizer.py
index 05f5b54..bd5a183 100755
--- a/sprite-optimizer.py
+++ b/sprite-optimizer.py
@@ -126,11 +126,11 @@ def get_best_solution(img, lines):
 def generate_code(lines, args):
 	str_x, str_y = "{", "{"
 
-	for (xa, yb), (x, y) in lines:
+	for (xa, ya), (x, y) in lines:
 		x, y = x + int(args.offset[0]), y + int(args.offset[1])
-		a, b = xa - x + int(args.offset[0]), yb - y + int(args.offset[1])
-		str_x += "{}, ".format(get_coord(x, a))
-		str_y += "{}, ".format(get_coord(y, b))
+		xa, ya = xa + int(args.offset[0]), ya + int(args.offset[1])
+		str_x += "{}, ".format(get_coord(x, xa))
+		str_y += "{}, ".format(get_coord(y, xb))
 
 	str_x = str_x[:-2] + "}"
 	str_y = str_y[:-2] + "}"