diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
index 2ac00c57e..d7a05ebe2 100644
--- a/gui/mainwindow.cpp
+++ b/gui/mainwindow.cpp
@@ -928,7 +928,7 @@ Settings MainWindow::getCppcheckSettings()
     result.jobs = mSettings->value(SETTINGS_CHECK_THREADS, 1).toInt();
     result.inlineSuppressions = mSettings->value(SETTINGS_INLINE_SUPPRESSIONS, false).toBool();
     result.inconclusive = mSettings->value(SETTINGS_INCONCLUSIVE_ERRORS, false).toBool();
-    if (result.platformType == cppcheck::Platform::Unspecified)
+    if (!mProjectFile || result.platformType == cppcheck::Platform::Unspecified)
         result.platform((cppcheck::Platform::PlatformType) mSettings->value(SETTINGS_CHECKED_PLATFORM, 0).toInt());
     result.standards.setCPP(mSettings->value(SETTINGS_STD_CPP, QString()).toString().toStdString());
     result.standards.setC(mSettings->value(SETTINGS_STD_C, QString()).toString().toStdString());