diff --git a/src/plugins/qmldesigner/designercore/instances/puppetbuildprogressdialog.cpp b/src/plugins/qmldesigner/designercore/instances/puppetbuildprogressdialog.cpp
index 13f3ce8ef58..3777fa3633e 100644
--- a/src/plugins/qmldesigner/designercore/instances/puppetbuildprogressdialog.cpp
+++ b/src/plugins/qmldesigner/designercore/instances/puppetbuildprogressdialog.cpp
@@ -40,6 +40,7 @@ PuppetBuildProgressDialog::PuppetBuildProgressDialog() :
     m_useFallbackPuppet(false)
 {
     setWindowFlags(Qt::SplashScreen);
+    setWindowModality(Qt::ApplicationModal);
     ui->setupUi(this);
     ui->buildProgressBar->setMaximum(85);
     connect(ui->useFallbackPuppetPushButton, SIGNAL(clicked()), this, SLOT(setUseFallbackPuppet()));