diff --git a/src/plugins/qt4projectmanager/qtversionmanager.cpp b/src/plugins/qt4projectmanager/qtversionmanager.cpp
index 5214c5999d1..8c5c1345fe9 100644
--- a/src/plugins/qt4projectmanager/qtversionmanager.cpp
+++ b/src/plugins/qt4projectmanager/qtversionmanager.cpp
@@ -527,6 +527,10 @@ bool QtVersionManager::equals(QtVersion *a, QtVersion *b)
         return false;
     if (a->m_displayName != b->displayName())
         return false;
+    if (a->m_sbsV2Directory != b->m_sbsV2Directory)
+        return false;
+    if (a->m_systemRoot != b->m_systemRoot)
+        return false;
     return true;
 }