diff --git a/src/plugins/qt4projectmanager/qt4nodes.cpp b/src/plugins/qt4projectmanager/qt4nodes.cpp
index b0909b96076..2a2df7cd5e2 100644
--- a/src/plugins/qt4projectmanager/qt4nodes.cpp
+++ b/src/plugins/qt4projectmanager/qt4nodes.cpp
@@ -891,7 +891,6 @@ ProFileReader *Qt4PriFileNode::createProFileReader() const
         reader->setQtVersion(version);
 
     reader->setOutputDir(m_qt4ProFileNode->buildDir());
-    reader->setCumulative(false);
 
     return reader;
 }