diff --git a/common/project.cpp b/common/project.cpp
index d01d236d..1a32657a 100644
--- a/common/project.cpp
+++ b/common/project.cpp
@@ -70,7 +70,7 @@ Project::Project(bool IsPreview)
 	mActiveModel->SetSaved();
 	mModels.Add(mActiveModel);
 
-	if (!mIsPreview)
+	if (!mIsPreview && gMainWindow)
 		QObject::connect(&mFileWatcher, SIGNAL(fileChanged(const QString&)), gMainWindow, SLOT(ProjectFileChanged(const QString&)));
 }