diff --git a/mainwindow.cpp b/mainwindow.cpp
index 1132ac3b..ad45652a 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -533,8 +533,8 @@ namespace
       bits += 6;
       if (bits >= 8)
       {
-        bytes[byte++] = words >> (bits - 8);
         bits         -= 8;
+        bytes[byte++] = words >> bits;
       }
     }