diff -rupN qt-creator-opensource-src-4.0.0-beta1/src/libs/clangbackendipc/clangbackendipc_global.h qt-creator-opensource-src-4.0.0-beta1-new/src/libs/clangbackendipc/clangbackendipc_global.h
--- qt-creator-opensource-src-4.0.0-beta1/src/libs/clangbackendipc/clangbackendipc_global.h	2016-03-22 15:59:58.000000000 +0100
+++ qt-creator-opensource-src-4.0.0-beta1-new/src/libs/clangbackendipc/clangbackendipc_global.h	2016-03-24 14:03:58.396209501 +0100
@@ -27,6 +27,7 @@
 #define CLANGBACKENDIPC_GLOBAL_H
 
 #include <QtCore/qglobal.h>
+#include <ostream>
 
 #if defined(CLANGBACKENDIPC_BUILD_LIB)
 #  define CMBIPC_EXPORT Q_DECL_EXPORT