diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index eb4758901ec..b0e0af8bcb3 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,8 @@
 2015-09-03  Jonathan Wakely  <jwakely@redhat.com>
 
+	PR libstdc++/66902
+	* src/c++11/debug.cc (_S_debug_messages): Make array const.
+
 	PR libstdc++/66998
 	* include/experimental/functional (_Not_fn): Add exception
 	specifications and non-deduced return types.
diff --git a/libstdc++-v3/src/c++11/debug.cc b/libstdc++-v3/src/c++11/debug.cc
index c435de70b51..ac3ac67b49e 100644
--- a/libstdc++-v3/src/c++11/debug.cc
+++ b/libstdc++-v3/src/c++11/debug.cc
@@ -103,7 +103,7 @@ namespace
 
 namespace __gnu_debug
 {
-  static const char* _S_debug_messages[] =
+  const char* const _S_debug_messages[] =
   {
     // General Checks
     "function requires a valid iterator range [%1.name;, %2.name;)",