diff --git a/src/plugins/projectexplorer/projectwindow.cpp b/src/plugins/projectexplorer/projectwindow.cpp
index b1cd90e9d3abaa755eb90c17d5b3256b04b9231f..be88e017f0e07e47ca2e3863bc099f8d092ee5de 100644
--- a/src/plugins/projectexplorer/projectwindow.cpp
+++ b/src/plugins/projectexplorer/projectwindow.cpp
@@ -360,7 +360,8 @@ void ProjectWindow::refreshProject()
 void ProjectWindow::startupProjectChanged(ProjectExplorer::Project *p)
 {
     int index = m_tabIndexToProject.indexOf(p);
-    m_tabWidget->setCurrentIndex(index);
+    if (index != -1)
+        m_tabWidget->setCurrentIndex(index);
 }
 
 void ProjectWindow::showProperties(int index, int subIndex)