diff --git a/platform/qt/dmxwidget/dmxwidget.cpp b/platform/qt/dmxwidget/dmxwidget.cpp
index b1e35a6..7acdf3c 100644
--- a/platform/qt/dmxwidget/dmxwidget.cpp
+++ b/platform/qt/dmxwidget/dmxwidget.cpp
@@ -109,7 +109,8 @@ void DmxWidget::parseMessageBuffer()
     msg->iStream(stream);
     // ship it
     routeRxMessage(msg);
-    fast_forward(length + fixed_length - 1); // discard processed bytes
+    // discard processed bytes
+    fast_forward(length + fixed_length);
   }
 }