diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index ef5bf5ae4a..7014c6fdcf 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,7 @@
+2005-09-19  Ralf Corsepius <ralf.corsepius@rtems.org>
+
+	* configure.ac: Check for sys/errno.h.
+
 2005-09-16  Ralf Corsepius <ralf.corsepius@rtems.org>
 
 	* libnetworking/Makefile.am: Cosmetics.
diff --git a/cpukit/configure.ac b/cpukit/configure.ac
index 6478b0ff50..e598c5c797 100644
--- a/cpukit/configure.ac
+++ b/cpukit/configure.ac
@@ -81,6 +81,11 @@ AC_CHECK_HEADER([stdint.h])
 AC_CHECK_HEADER([inttypes.h])
 AC_CHECK_HEADER([tar.h])
 
+## BSD-ism, should not be used in RTEMS, 
+## nevertheless it still is.
+AC_CHECK_HEADER([sys/errno.h],[],
+  [AC_MSG_ERROR([Missing required header sys/errno.h])])
+
 ## if using newlib, we provide stdint.h and inttypes.h
 AM_CONDITIONAL([RTEMS_PROVIDES_STDINT_H],
   [test x"${RTEMS_USE_NEWLIB}" = xyes \