diff --git a/src/plugins/qt4projectmanager/qtversionmanager.cpp b/src/plugins/qt4projectmanager/qtversionmanager.cpp
index 83ba6d28f618d5be901d038afb622e8a2a00c140..34e4dcf9cd2d49b2c6e808e047cec86700b2e177 100644
--- a/src/plugins/qt4projectmanager/qtversionmanager.cpp
+++ b/src/plugins/qt4projectmanager/qtversionmanager.cpp
@@ -414,6 +414,8 @@ bool QtVersionManager::equals(QtVersion *a, QtVersion *b)
         || a->m_msvcVersion != b->m_msvcVersion
         || a->m_mwcDirectory != b->m_mwcDirectory)
         return false;
+    if (a->m_displayName != b->displayName())
+        return false;
     return true;
 }