--- avidemux2.old-git-015251dbb/avidemux/qt4/ADM_qt/src/ADM_qtx.cpp
+++ avidemux2-git-015251dbb/avidemux/qt4/ADM_qt/src/ADM_qtx.cpp
@@ -16,7 +16,7 @@
 }
 
 #else
-#ifdef USING_QT6
+#ifdef HOW_NOW_MOO_COW
 QT_LINUX_WINDOW_ENGINE admDetectQtEngine()
 {
     if (engineDetected)