diff --git a/xorriso/configure_ac.txt b/xorriso/configure_ac.txt
index 0fc8715c..7d2080bb 100644
--- a/xorriso/configure_ac.txt
+++ b/xorriso/configure_ac.txt
@@ -1,6 +1,6 @@
 
 # configure.ac stems from xorriso/configure_ac.txt and leads to ./configure
-# Copyright (c) 2007 - 2017 Thomas Schmitt <scdbackup@gmx.net>
+# Copyright (c) 2007 - 2018 Thomas Schmitt <scdbackup@gmx.net>
 # Provided under GPL version 2 or later.
 
 AC_INIT([xorriso], [1.4.9], [http://libburnia-project.org])
@@ -251,11 +251,16 @@ fi
 
 AH_TEMPLATE([Libisofs_with_aaip_xattR],
             [Define to use Linux xattr capabilities])
+AH_TEMPLATE([Libisofs_with_sys_xattR],
+            [Define to include Linux sys/xattr.h instead of attr/xattr.h])
 AH_TEMPLATE([Libisofs_with_freebsd_extattR],
             [Define to use FreeBSD extattr capabilities])
 AC_ARG_ENABLE(xattr,
               [  --enable-xattr          Enable use of extended file attributes by libisofs, default=yes],
               , enable_xattr=yes)
+AC_ARG_ENABLE(xattr_h_pref_attr,
+              [  --enable-xattr-h-pref-attr   Prefer include file attr/xattr.h over sys/xattr.h, default=no],
+              , enable_xattr_h_pref_attr=no)
 
 XATTR_DEF=
 if test x"$LIBBURNIA_SUPP_FATTR" = xxattr
@@ -263,9 +268,52 @@ then
     if test "x$enable_xattr" = xyes; then
 dnl Check whether there is the header for Linux xattr.
 dnl If not, erase this macro which would enable use of listxattr and others
-        XATTR_DEF="-DLibisofs_with_aaip_xattR"
-        AC_CHECK_HEADER(attr/xattr.h, AC_CHECK_LIB(c, listxattr, X= ,
-                                                   XATTR_DEF= ), XATTR_DEF= )
+        XATTR_A_DEF=
+        XATTR_S_DEF=
+        if test x"$enable_xattr_h_pref_attr" = xyes
+        then
+            echo "prefering include file attr/xattr.h over sys/attr.h"
+            XATTR_A_DEF=1
+            AC_CHECK_HEADER(attr/xattr.h, AC_CHECK_LIB(c, listxattr, X= ,
+                                                 XATTR_A_DEF= ), XATTR_A_DEF= )
+            if test x"$XATTR_A_DEF" = x1
+            then
+                XATTR_DEF="-DLibisofs_with_aaip_xattR"
+            else
+                XATTR_S_DEF=1
+                AC_CHECK_HEADER(sys/xattr.h, AC_CHECK_LIB(c, listxattr, X= ,
+                                                 XATTR_S_DEF= ), XATTR_S_DEF= )
+                if test x"$XATTR_S_DEF" = x1
+                then
+                    XATTR_DEF="-DLibisofs_with_aaip_xattR"
+                    AC_DEFINE([Libisofs_with_sys_xattR], [])
+                fi
+            fi
+        else
+            XATTR_S_DEF=1
+            AC_CHECK_HEADER(sys/xattr.h, AC_CHECK_LIB(c, listxattr, X= ,
+                                                 XATTR_S_DEF= ), XATTR_S_DEF= )
+            if test x"$XATTR_S_DEF" = x1
+            then
+                XATTR_DEF="-DLibisofs_with_aaip_xattR"
+                AC_DEFINE([Libisofs_with_sys_xattR], [])
+            else
+                XATTR_A_DEF=1
+                AC_CHECK_HEADER(attr/xattr.h, AC_CHECK_LIB(c, listxattr, X= ,
+                                                 XATTR_A_DEF= ), XATTR_A_DEF= )
+                if test x"$XATTR_A_DEF" = x1
+                then
+                    XATTR_DEF="-DLibisofs_with_aaip_xattR"
+                fi
+            fi
+        fi
+        if test x"$XATTR_S_DEF" = x1
+        then
+            echo "decided  to include file sys/attr.h"
+        elif test x"$XATTR_A_DEF" = x1
+        then
+            echo "decided  to include file attr/xattr.h"
+        fi
     fi
 elif test x"$LIBBURNIA_SUPP_FATTR" = xextattr
 then
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 1c48dddd..c563a8ab 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2018.05.08.092636"
+#define Xorriso_timestamP "2018.05.18.152119"