diff --git a/tools/retro-muri.py b/tools/retro-muri.py
index 3ba8df1..87d763d 100755
--- a/tools/retro-muri.py
+++ b/tools/retro-muri.py
@@ -137,7 +137,7 @@ def pass2():
 def save(filename):
     with open(filename, "wb") as file:
         j = 0
-        while j < 1024:
+        while j < 1024 * 8:
             file.write(struct.pack("i", image[j]))
             j = j + 1