diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 9df0dab0e93..f69761d39ab 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2012-10-21  Hans-Peter Nilsson  <hp@bitrange.com>
+
+	* testsuite/23_containers/bitset/45713.cc: Skip for mmix-*-*.
+	Tweak sizetype-related comment.
+
 2012-10-20  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
 	* include/std/scoped_allocator: Avoid badname.
diff --git a/libstdc++-v3/testsuite/23_containers/bitset/45713.cc b/libstdc++-v3/testsuite/23_containers/bitset/45713.cc
index fe2068c3171..da52c499ba2 100644
--- a/libstdc++-v3/testsuite/23_containers/bitset/45713.cc
+++ b/libstdc++-v3/testsuite/23_containers/bitset/45713.cc
@@ -16,9 +16,9 @@
 // <http://www.gnu.org/licenses/>.
 
 // The testcase requires bitsizetype to be wider than sizetype,
-// otherwise types/vars with 0x20000000 bytes or larger can't be used.
-// See http://gcc.gnu.org/PR54897
-// { dg-do compile { target { ! { avr*-*-* cris*-*-* h8300*-*-* mcore*-*-* moxie*-*-* } } } }
+// otherwise types/vars with (e.g. for 32-bit sizetype) 0x20000000
+// bytes or larger can't be used.  See http://gcc.gnu.org/PR54897
+// { dg-do compile { target { ! { avr*-*-* cris*-*-* h8300*-*-* mcore*-*-* moxie*-*-* mmix-*-* } } } }
 
 #include <bitset>