diff --git a/src/app/main.cpp b/src/app/main.cpp
index 04842be67..711379191 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -136,6 +136,9 @@ int main(int argc, char *argv[])
     // Attribute Qt::AA_EnableHighDpiScaling must be set before QCoreApplication is created
     if (qgetenv("QT_ENABLE_HIGHDPI_SCALING").isEmpty() && qgetenv("QT_AUTO_SCREEN_SCALE_FACTOR").isEmpty())
         Application::setAttribute(Qt::AA_EnableHighDpiScaling, true);
+    // HighDPI scale factor policy must be set before QGuiApplication is created
+    if (qgetenv("QT_SCALE_FACTOR_ROUNDING_POLICY").isEmpty())
+        Application::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
 #endif
 
     try {