diff --git a/mkspecs/common/rtems/qplatformdefs.h b/mkspecs/common/rtems/qplatformdefs.h
index 1baa7c7d74f..b4ec1de87fa 100644
--- a/mkspecs/common/rtems/qplatformdefs.h
+++ b/mkspecs/common/rtems/qplatformdefs.h
@@ -57,8 +57,10 @@
 #include <pwd.h>
 #include <grp.h>
 
-#include "../posix/qplatformdefs.h"
+#define __LINUX_ERRNO_EXTENSIONS__
+#include <errno.h>
 
+#include "../posix/qplatformdefs.h"
 
 #ifdef __STRICT_ANSI__
 #undef __STRICT_ANSI__
diff --git a/src/corelib/kernel/qcore_unix_p.h b/src/corelib/kernel/qcore_unix_p.h
index b56c2b97323..6ec7d283180 100644
--- a/src/corelib/kernel/qcore_unix_p.h
+++ b/src/corelib/kernel/qcore_unix_p.h
@@ -52,8 +52,8 @@
 // We mean it.
 //
 
-#include <QtCore/private/qglobal_p.h>
 #include "qplatformdefs.h"
+#include <QtCore/private/qglobal_p.h>
 #include "qatomic.h"
 #include "qbytearray.h"