diff --git a/src/src.pro b/src/src.pro
index 1ba2f49fc..2728e6d5f 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -23,7 +23,7 @@ nogui {
         DEFINES += QBT_STATIC_QT
         QTPLUGIN += qico
     }
-    win32: lessThan(QT_VERSION_MAJOR, 6) {
+    win32: lessThan(QT_MAJOR_VERSION, 6) {
         QT += winextras
     }
     macx {