diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9524865fc0c..63f4cc0076c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2013-12-07  Ralf Corsépius  <ralf.corsepius@rtems.org>
+
+	* config.gcc (microblaze*-*-rtems*): Add TARGET_BIG_ENDIAN_DEFAULT.
+
 2013-12-06  Vladimir Makarov  <vmakarov@redhat.com>
 
 	* config/rs6000/rs600.md (*bswapdi2_64bit): Remove ?? from the
diff --git a/gcc/config.gcc b/gcc/config.gcc
index dc76c82e747..230c524f7c1 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1887,6 +1887,14 @@ microblaze*-linux*)
 	tmake_file="${tmake_file} microblaze/t-microblaze-linux"
 	;;
 microblaze*-*-rtems*)
+	case $target in
+		microblazeel-*)
+			tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=0"
+			;;
+		microblaze-*)
+			tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=4321"
+			;;
+	esac
 	tm_file="${tm_file} dbxelf.h"
 	tm_file="${tm_file} microblaze/rtems.h rtems.h newlib-stdint.h"
 	c_target_objs="${c_target_objs} microblaze-c.o"