--- qt-creator-2.6.2-src/qtcreator.pri~	2013-02-27 13:55:23.818990553 +0000
+++ qt-creator-2.6.2-src/qtcreator.pri	2013-02-27 13:55:52.335454428 +0000
@@ -147,6 +147,7 @@
 }
 
 INCLUDEPATH += \
+    /usr/include \
     $$IDE_BUILD_TREE/src \ # for <app/app_version.h>
     $$IDE_SOURCE_TREE/src/libs \
     $$IDE_SOURCE_TREE/tools \