diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index ead095e786a..e240505e352 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2013-09-28  Tim Shen <timshen91@gmail.com>
+
+	* include/bits/regex_scanner.tcc (_Scanner<>::_M_eat_escape_posix):
+	Let ordinary char escaping in POSIX be valid.
+	* testsuite/28_regex/basic_regex/ctors/basic/raw_string.cc: Test this
+	change.
+
 2013-09-27  François Dumont  <fdumont@gcc.gnu.org>
 
 	* include/bits/predefined_ops.h: New.
diff --git a/libstdc++-v3/include/bits/regex_scanner.tcc b/libstdc++-v3/include/bits/regex_scanner.tcc
index e0dff9009c6..fc8273878ce 100644
--- a/libstdc++-v3/include/bits/regex_scanner.tcc
+++ b/libstdc++-v3/include/bits/regex_scanner.tcc
@@ -457,7 +457,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	  _M_value.assign(1, __c);
 	}
       else
-	__throw_regex_error(regex_constants::error_escape);
+	{
+#ifdef __STRICT_ANSI__
+	  __throw_regex_error(regex_constants::error_escape);
+#else
+	  _M_token = _S_token_ord_char;
+	  _M_value.assign(1, __c);
+#endif
+	}
       ++_M_current;
     }
 
diff --git a/libstdc++-v3/testsuite/28_regex/basic_regex/ctors/basic/raw_string.cc b/libstdc++-v3/testsuite/28_regex/basic_regex/ctors/basic/raw_string.cc
index 68fd56af760..d005dc040eb 100644
--- a/libstdc++-v3/testsuite/28_regex/basic_regex/ctors/basic/raw_string.cc
+++ b/libstdc++-v3/testsuite/28_regex/basic_regex/ctors/basic/raw_string.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=c++0x" }
-// { dg-do run { xfail *-*-* } }
+// { dg-options "-std=gnu++11" }
 
 // 2012-08-20  Benjamin Kosnik <bkoz@redhat.com>
 //