diff --git a/DCPlugin.pro b/DCPlugin.pro
index 16c1ea5..e702dc2 100644
--- a/DCPlugin.pro
+++ b/DCPlugin.pro
@@ -38,6 +38,8 @@ contains( CONFIG, PTU5 ) {
 }
 
 contains( CONFIG, PTU5_YOCTO ) {
+    greaterThan(QT_MAJOR_VERSION, 4): QT += serialport
+    PTU5BASEPATH = /opt/devel/ptu5
     ARCH = PTU5
 
     # add qmqtt lib