diff --git a/src/plugins/qt4projectmanager/qt4nodes.cpp b/src/plugins/qt4projectmanager/qt4nodes.cpp
index 02b573e2b577eaa650d478b5601241cd90039583..e24d5c5a77afc4c2399e0f42669aaf441836ec2a 100644
--- a/src/plugins/qt4projectmanager/qt4nodes.cpp
+++ b/src/plugins/qt4projectmanager/qt4nodes.cpp
@@ -2148,6 +2148,7 @@ QStringList Qt4ProFileNode::includePaths(QtSupport::ProFileReader *reader) const
     }
 
     paths.append(reader->absolutePathValues(QLatin1String("INCLUDEPATH"), m_projectDir));
+    paths.append(reader->absolutePathValues(QLatin1String("QMAKE_INCDIR"), m_projectDir));
     // paths already contains moc dir and ui dir, due to corrrectly parsing uic.prf and moc.prf
     // except if those directories don't exist at the time of parsing
     // thus we add those directories manually (without checking for existence)